line Powered mod els pets dont mix Fuel containers metal plastic best Engine back fire fires LONG agoin January l980 issue magazinemy first safety column appeared So finish column Safety Comes First will have finished its first decade print short math skills thats 120 dividual columns Bill Winter editor Model Aviation time asked Id willing author safety column first reaction Id give best shot doubted could come up enough safety-related topics make beyond year Fortunately read ers column have responded let ters some clubs supply newslet ters Both readers clubs have provided invaluable source material column based quote popular com mercial wine cooler beverage thank support whether can complete second decade remains seen Dogs No Im referring ratty models frequently see club flying field concerns four-legged variety opinion should seen frolicking around flying fieldbut may also risk injury modeling activities home July 1989 issue Tiger Rag newsletter Coeur dAlene Aeromodelers Society CAMS sent its editor think Bill Wood Bill suggested might inter ested article issue titled Pooch Safety read follows constantly reminded about need safety precautions protect property other fliers spectators No article mentions pets Heres couple contributions news letter should make consider safety pre cautions have pets first starts off engine test stand mounted sawhorse running 05 48 Master Airscrew 12 x 5 prop full throttle sitting another sawhorse set parallel test stand head down adjusted mixture control glanced up saw little dog walking straight toward nose no eight inches prop obviously couldnt see reached over test stand pulled whole rig over toward process sawhorse sitting tipped over backwards prop hit knee giving three deep gouges got wounded exercise dog walked full-throttle prop would have killed second tells tale club swap meet bought pack #11 X-Acto blades Ken Crites fire sale box watersoaked some blades rusted got home sorted out blades threw rusty ones garbage next morning breakfast table wife said Whats ledi black Lab pup chewing thats making carpet red got down knees checked pups mouth found three #11 X-Acto blades mouth chopped up have ever owned black Lab pup will know chew up swallow anything doesnt fight back So off vet gofast Seventy-eight bucks later find X-rays show no X-Acto blades innards Obviously very careless disposal blades got shop picked up off floor Moral Protect pet harm know less about what ing look Out Staying subject canine safety its September 1989 issue another model airplane publication contained several photoraphs dog chasing low-flying about two-foot altitude model photos dog appeared just about chomp down fuselage model across picture cap tion RCFun whole family Maybe fun both flier dog since dog lucky didnt get hit prop according accompanying text dur ing low pass dog slammed model ground both dog model survived latter requiring some repairs Ill leave up guess feel about type ac tivity insist taking dog fly ing field suggest keep leash Electric fuel pumps September 1989 col umn asked readers opinions whether safe use electric fuel pump dispense gas oline model expected see lot letters subject two readers sent opinions diametrically op posed reason brought up issue first place stems phone call Bill Cann member NVRC longtime friend wanted know received letters con cerning possible hazard using electric fuel pumps dispense gasoline recently took look Bills setup conContinued page 16 14 Model Aviation Use electric fuel pumps gaso fr BA ENOLAcW ThAT YCLL R1N ThE tOCr DOES 4E 1441/E Tt E CJTCTOA Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose STITS PLAYBOY 113 SCALE 88 40-50 2 cycle 4 channel 455-5 lbs Balsa Foam & Balsa Balsa Reg Price $9695 valid other offer coupon SPECIFICATIONS Engine size Radio Weight Fuselage Wing Tail Section Cowl Epoxy Glass e molded Balsa & necessary hardware included Over two years design development have gone 050 Weasel YOU mind detailed easy understand instruction make Weasel quick build fun fly Advanced Sport Fattern flyers will appreciate excellent flying characteristics ability customize airframe suit eye need Weasel can pour power tear up sky pull back cruise afternoon away Designed & Engineered RC DESIGNS 75 Price Drive Wilmington Ohio 45177 5133822158 Hrs 4-a pm Mon-Fri Terms US ocrency vviy ucceel MusterCard & Vise 00s $300 PP $400 $350 Havdhvt Ohix resideets add 5% seles tac 12-6 pm Saturdays sists automobile fuel pump mounted top one-gallon metal fuel can pump body inside can Electric power supplied pump via wires about four feet long permanently attached pump terminals Banana plugs other end wires con nect pump power panel Bills field box seemed like pretty safe arrangement However recent letter John Brassner ap pears have different opinion John La Mesa CA concerned spark pumps on/off switch could ig nite gasoline vapors letter stated RCers use power panel control electric fuel pumps opinion would safe practice gasoline least two reasons First power panel fuel container usually mounted flight box either right next other within few inches other Clearly spark power panels pump switch could easily ignite gasoline vapors adjacent gas can Second some other switching device used does seem likely would located safe distance gas can aircraft being fueled conclusion does seem automo bile fuel pump itself would safe fueling model aircraft danger vapor ignition arcing on/off switch very high John also pointed out same hazard could presented electric starter other electrical device operated vicin ity gasoline cannot disagree Johhs opin ion unsealed switch motor located close proximity can containing gasoline Con yinued page 18 old timer perfectly proportioned modeling Curtiss Robin 049 Engines -channel RIC 41 Wingspan Electric Power Optional $2295 Oi em3 very law tell scale aimratt ideally sailed medal night aa appealing old cartisa ReSin spruce ana linen age beaetitully pwpertioned rubber electric er glow engines Easy end Ian build trainer-like performance Flyllee Medals Catalog 50Photo 703 273wta INE MODELS INC RO Boa 2136 Fairfax VirgInIa 22031 USA - HOBBY SHOP JET bust completely finished authentically detailed poseable 1/8 scale Ifl QOenierpr~se2051 224-4170 Wp o box 5631tresno cx 93755 16 Model Aviation MUNUUUUIL UA 114 SCALE 96 WACO UPF-7 1/5 SCALE 72 HOLIDAY $8495 SPECIAL BALSA SHEETS 36 48 30 16233 332240 18243 318249 14 258 132337 1 20337 1 1633749 31 33234458 37 18 35471 45 31636282 55 14 37395 81 518385110 38388124 71 12 3110155 34 3165191 1 1645878 48 33247094 58 1848010688 916493122 75 144110134 84 984165225139 12 4225281 MATCHED SHUTS 42 3324100 154108 3184120 144131 BALSA STICKS 3645 1161409 1163810 1161214 3321410 332 3812 3321216 181005 18141118 18381218 18121024 3163161118 316 351720 316 122230 14141624 14 381926 4122130 14343444 14 14055 5165162128 38 382737 38123246 36 344255 38 15270 12123653 12344662 12 15878 58 584885 34 346790 V BALSA TRIANGL ES 36 29 8830 35 45 55 BALSA PLANKS36 58 00 1480 1123275 1124360 22225 23325 24435 33495 34688 TAPERED SHEETS 36 14265 14385 38268 38398 123120 LONE STAR EPOXY 9 oL51895 Sw,598 16,,598 30n,r598 U 3] 11 ~ IZ1AA ~OEU CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 4-6 LB WOOD36 1323 53 120353 1163 53 332363 18377 316389 i43104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 384236 124322 TRAILING EDGE 36 14132 51611439 3611246 12270 INSTANT GLUE 1o 75ck 298 1 v Oh, 298 2vi TOcI 550 2v 11, 580 must try 4-6 lb balsa * NEW * Hundreds rt8W sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 3648 18 181725 18 142026 18 382232 3163162838 14 143450 14 3184055 14 124585 38 3S4989 38128077 12126888 12347597 SPRUCE TRIANGLES 38 38 1212 3434 LflI Pt Y48 18x6 18 x 12 14x6 14 x 12 BASSWOOD48 31631626 3161430 3163838 3161246 3163460 141442 143843 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 20-116336698 201 16436 1035 20332336 865 15332436 955 1618336 735 1518436 695 15316336 928 10316436 835 101 4336655 1014436 930 103/8336870 5384 36 655 512336 540 5124361080 10332 446 885 51/8448500 5316 448680 514448 845 _________ I HARD MAPLE 1438 3835 3812 3834 1234 BIRCH DOWELS 18 316 516 38 16 40 45 50 58 68 36 09 14 26 32 PLY8IRCU 48 184x12835 132x12475 118x12475 18x12495 5 PLYUIRCH 48 332x12700 18n12775 36316x12625 4714x12625 6438x12725 8112x12900 GROOVED LG MOUNTS 12 MehS 383418/40 38341532140 2 16146 175 350 275 550 LONE STAR MODELS Cant Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO 1623 57th St Lubbock IX 79412 Stntm Weaccept Visa Mastercard personal cheeks coo 614% tax Texas US currency Minimum Wood Order $1000 Tgi hobby pe am Kits P& W ModelService 1938 MisS America 84$7196 1936 Buccaneer 84 $8998 1937 Dallaire 108$7516 1838 Clipper Mk 72 $4156 1838 lOud King 63$4236 1938 PowerhouSe 84 $5386 1939 Record Breaker 96$6956 1939 Trenton Terror 7254076 1839 Korda Wake 44$1916 1939 Mercury 72 $5836 1939 Zipper 54$8356 1940 Ranger 46 $3798 1940 Sailplane 78 58476 1940 So Long 50 $3036 1841 Brigidier 56 $4076 1841 Super Quaker 78 $7276 1941 PlayboyJr54 $3116 1841 PlayboySr80 $5116 1941 Brooklyn 0040Cr56 $4236 Midway Model Co Full Kits 1936 Flying Osaker 84$64761938 PowerhouSe 50 $2996 1937 Long Cabin 78$47181939 T Spodner 50 $2996 1937 Quaker Flash 67$45561948 Buzzard Bombnhell l937AirChiet6l$3596 2opelkh $5896 l94ONewRaler74$7116 0tpankk 3096 Thc ubove kits qualify Sam events PP & R/C feature highest quality machine cut & sanded parts sheet & snip wood wire & window material Most plans original PP models easily convertible Sch R/C SaIplanes Electric Power Gas Kits MIDWAY MODEL COELECTRIC MODEL DESIGN Gnome 1-ILO 60$2400Sky Knight 44 05 DI$2400 Gnome2M Gsder79$3796ElectraGlde II 73 05D$3100 Fast Edde 05 D $2480 Lightning 36 09 0 $2400 UtmMkiV 10661 $3796 TttermcTruneller OSOorO $3100 Electric Playboy 05 GI $2600 Hobby Horn Senanar Girder 78 lot 05 electric $1800 Astro ChulleIrger 05 Geared $3250 Astro Viking 85 Geared $3250 Astre Portedield 1150120 Geared $5998 Astro SpaS 37 05 Direct $2996 Daneyn Robin 05 Geared $3371 Daveys Le Crate 05 Gearetll $3596 FULL LINE OF ELECTRIC SYSTEMS & PARTS AVAIL SHIPPINO & I4ANOLINO76 Page CATALOGUE Upto $800 4014 5200$206 pp/lot Class free $801 $2000 add $250when requested order $2001 $4500 add $325 $4501 $7000 add $375HOBBY HORN Ooer $7006 add $450 CA Addressees add 8% tao Send 3 MOran St [A MO VISA / MC 8 5 Eop Check llox 2212 allOw up 1030 days br checkWestminster Ca 92684 clearuoce 993-8311 COD t charges pius $150Hra Mon-Fri 9AM 5PM handling CasS Only possibility spark Could ignite gas oline vapor However opposite opinion expressed letter JD Tison Bradley IL JD son involved automobile drag rac ing over 15 years have auto parts speed equipment company called Engine Mas ters JD has also modeling 56 years prize possession currently scratchbuilt 104-in-span PT-19 sketch flight box accompanied let ter shows electric fuel pump Honda mounted end box power panel other gasoline can mounted flight box stands ground remote box fuel can to-pump pump-to-model flows through automotive vacuum hoses JD reports no prob lems arrangement seems can safely use elec tric pump dispense gasoline model keep fuel can model being fueled well away sources electrical arcs However dont want redesign flight box suggest take look new Du-Bro Model F/P 491 handoperated plunger-type fuel pump mounts neatly cap either plastic metal fuel can Only plunger fuel outlet ex posed According Du-Bro stroke pump will dispense ounce fuel pump claimed work well either glow diesel gasoline fuels Fuel containers Continuing subject fueling systems lets turn electric pumps containers Which type container safer metal plastic question posed September column Ellis McGaughy Con finued page 20 18 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE CoIl 18061745 6394 lOam 6pmCeatralTime rWARBIRDS rate home ofliceor shop ouroutstnsdisg Warbird plaques 39 styles choose trom 6406 actually 3-view drawing has screened 004 metal plate placed 9 X 12 plaque cut key hole slot mount Ilash wall Only $1490 na tour br $4995 delivered via UPS prepaid Available gold silver Please specily color plane names Order direct Send check money order Visa/Mastercard namber enpiraSon date No hassle money back guarantee P-380 AircobraP51-u ikbuurangFJ-4 Fury 8-1000 FlyingF9F-S CougarF-OA 86 Freedom FortressHawker Fighter B-28A Super HurricaneF-840 Thundvrjet FortreanHawkerF- 1050 Thunder P400 Warhawk Sea Fury Chief 582C-3 HelldiverJunkers StukaF-470 Thunderbolt Mosquito B4F86F-lo4JStarhghterSikorsky Sea Sat C-t24CP-38J LightningSpitfire GlohemasterP-SOB ShootingF4U-tO Corsair Oouglas OC-3 StarF-BE Crusader F40-t SkyrayA-tJSkyraderFokkerl3-VII DouglasSkyhawk IISopwith Camel DauntleasldeuaeruchmirrSPAD 13C Focke Wull tgt2GMig 25 FoxhatNewport 17 C-I F6F-3 HellcatF-880 SabreF9F-2 Searcat also have award plaques available tsr R/C F/F C/ br contesla Write br tree brochure Prices start $795 includes engraving shipping costa achve modelers will treat rightl Jim & Mary Jennings AMA 891 396 JENNINGS PRODUCTS DEPT MA-i OX 1121 HENDERSONVILLE TN 37977-1121 16151 824-0475 HOT STUFF Leading way 20 years last C C 0 0 0 0 5 O 00 CO 0 0 Pilot wwI Civ/Spoi WWII 1995 Add $3ir item Califorriiots add 8aI8 M9@ enterpriseS po box 5631fresno calif93755 209 2244170 ______________ u11 Figure 1/6 scale $2995 2995 3750 responded Ellis chemical engineer employed Charleston WV chemical com pany has modeling some 15 years following say Up front let say have come conclusion metal safer though plas tic has its virtues 'Methanol well gasoline must treated respect Methanol has two key char acteristics remember good other bad Methanol electrically conductive fore cannot build hold static charge could provide source ignition property holds true liquid has nothing container liquid stored container electrically nonconduc tive can cause spark due static electricity bad property methanol related fuel/air mixture generated room temperature worst possible explosions occur flammable vapor present stoichiometric pro portions oxygen simply means exact amount air required burn fuel present too lean too rich vapor pressure methanol such very nearly creates proper mixture room temperature Therefore extremely explosive mixture exists fuel containers controllable factor prevents explosion absence ignition source Industry typi cally uses nitrogen inerting extensive equip ment grounding ensure explosion doesnt occur trogen inerting practical purposes work safety standards allow stor age flammable materials plastic containers larger gallon restriction because Continued page 22 20 Model Aviation RADIO CONTROL SNORT KIT AMERICAN P40 Tomahawk TO 45 ENGINES WING SPAN 55 FLIES LIKE DREAM WITH PLENTY OF WING AND TAIL AREA FOR FULL-RANGE POSITIVE CONTROL DESIGNED WITH FOAM WING AND BOX FRAME FUSELAGE FOR SIMPLE AND STURDY CONSTRUCTION WE FURNISH THE ESSENTIAL PARTS ALONG WITH EASY-TO-FOLLOW PLANS AND LET THE BUILDER SELECT HIS OWN WOOD AND ADDITIONAL HARDWARE SNORT KIT INCLUDES PRECISION CUT ARCOFOAM WING CORES ABS HIGH-IMPACT COWLING FORMED WING GUN PORTS AND EXHAUST CRYSTAL CLEAR CANOPY WITH FRAMEWORK PLYWOOD FIREWALL LANDING GEAR STRAPS BLOCKS AND SCREWS FORMED STEEL ENGINE MOUNT CONTROL SURFACE HINGES CLEAR PLANS WITH CONSTRUCTION DETAILS AND ALL NECESSARY TEMPLATES BILL OF MATERIALS NO BALSA INCLUDED ORDERING StND CHECI OR MONEY ORDER FOP S3750 PLUS 450 POSTAGE CANADIANS ADD 650 TO WING Mfg 306 E Simmons Galesburg IL 61401 IL RtS ADD 6% SALES TAX ALL ORDERS MUST St IN US FUNDS StND 400 FOR PRODUCT CATALOG DESCRIBING OUR COMPLtTt LINE OP FOAM CORt REPLACEMtNT WINGS ACCESSORIES KITS TOOLS AND MUCH MORE 309-342-3009 Satellite ityPO BOX 836 SIMI VALLEY CALIFORNIA 93062PHONE 805 522-0062 plastic nonconductive can therefore cause static electrical discharge addition metal con tainers larger gallon should grounded prior filling emptying Most people realize importance grounding because absence visible grounding wire till ing ones automobile gasoline Actually grounding wire inside gasoline hose prevents possibility arcing electrical insulating property plastic al lows static develop also reduces prob ability accidentally shorting out batteries feel field box properly designed ie batteries located away fuel container wiring good condition hazard small have installed kill switch near 12-volt battery tripped off whenever field box use switch mounted location such cannot accidentally bumped would very difficult young child operate does safe guard help prevent fuel fires also prevents accidents related various electrical com ponents use Since us keep fuel containers hav ing capacities gallon less static dis charge may primary consideration making decision whether use metal can plastic bottle However other considerations localized hot spot like mis placed soldering iron cigarette will quickly cause failure plastic bottle plastic con tainer contact retaining strap other sharp object likely fail metal can used summary prefer metal fuel containers due durability inability create static charges Ideally container should safety can listed Underwriters Laboratories Inc approved Factory Mutual Engineering Corpo ration cans utilize spring-loaded lid de signed relieve internal pressure safely subjected fire exposure type safety container used feel advantages metal outweigh explosion hazard due fire exposure Metal containers help prevent fire starting first place Since Ellis seems have covered metalversus-plastic issue some depth dont believe necessary add further com ments Engine backfire fire Jessie Aronstein Pough keepsie NY sent page Flight-Line newsletter Mid-Hudson RC Club editor Donald Roy contained report incident experienced Mike Tebolt has happened daresay other readersthe backfire fire Read trying get 049 engine started Sailplane primer fuel run down power pod over plane en gine sputtered backfired spilled fuel caught fire Now dont know al cohol fire tough see dont know what part plane hold marshmallow over get properly cooked Mike able see parts plane burning because MonoKote tight ened up nicely too much developed holes increasing size Although no fire extinguishers field lostthere enough members field full hot air managed put out flames no structural damage Mike 22 Model Aviation Power easy starting power Smooth take offs power intricate maneuvers Red Max makes engine came alive power performance never expected can have power Its phone call away Power today next running power fully other _____ 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics _____ other fuel $231 ________ $309 ___ $388 _________ Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL iN QTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free qts gals No hand ling charge Freight collect drums Deduct 3% prepay Mix qty Total ty deter mines price sC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD ICOD add $2 per cartonl Personal checks may held until cleared OTYFUELiGAL 4GAL24GAL6OGAL12BGaI 154 GAL 1TOTAL$ ordered MIXTUREID RUMAMT RED MAX PREMIUM FUELI fuel beginners ft sport fiyere should use Avali synthetic castor blend RED MAX 0 RED MAX 5 RED MAX 10 RED MAX 12 RED MAX 15 $999$749$729$889$599$150 $1152$884$841$772$691$212 $1288$955$939$862$772$256 $1372$1029$1002$919$823$301 $1458$1094$1065$977$875$336 RED MAXRACINGFUEL Trophy winner planes boats ft cars two boat biends castor ok up 40 REDMAX2O$1775$1332$1296$1190$1065$464 RED MAX 26$1956$1474$1435$1317$1179$541 RED MAX 40$2539$1905$1854$1701$1524$774 REDMAX50$2922$2192$2133$1956$1753$929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 5653497$2622$2552$2343$2098$1162 RED MAX 4-CYCLE FUEL Eliminates datonation ft kickback 4-cycie engines smoother idie ft mon power 10-4CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1156 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1155 $1056 $950 RED MAX PERFORMANCE FUELI High flash point heavy oil use tuned pipes ducted fan ft other heavy dty app RED MAX FUEL Continued page 156 5 Performance$1200$900$876$804$720 10 Performance $1391$1043$1016$932$835 15 Performance 51583 $1187 $1155 $1060 $950 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps snd tunsci pipes 5Panern$1195$ 895 $ 870 $ 795 $695 10 Panern$1375$1035 $1009 $ 925 $825 iSPanern$1575 $1175 $1145 $1050 $940 SUPER TIGER 3000 FUEL Best fuel Super Tiger 2900-4000 engines ......SuperTiger3000 $1288 $965 $939 $862 $772$256 nitro week next year Red Maxs secret gredients keep engine last ing longer $225 ________ $299 _________ $375 ________ Grand Total RED MAX DIESEL FUEL Superior diesei back iist popuier demand customers Bail Bearings $1767 $1326 $1290 $1184 $1050 DieeelPfakr6eeriigs$1867 $1426 $1390 $1284 $11 50 SMOKER FLUID beet smoker fiuid 2 end 4 cycie engines Smoker Fiuld$1256 $965 $939 $862 $772$266 CUSTOM BLENDED FUEL INC RDIENTS Avatiabie type engine use Caii price Mm gaiion boats-cars-heIicoptersspeed-pstternscaie-A scaie-kavan-gnition-st3000 PLEASE PRINT CiTY STATE ZiP CARD TYPE AND NC EXPIRATION DATE GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 14, 16, 18, 20, 22, 156
line Powered mod els pets dont mix Fuel containers metal plastic best Engine back fire fires LONG agoin January l980 issue magazinemy first safety column appeared So finish column Safety Comes First will have finished its first decade print short math skills thats 120 dividual columns Bill Winter editor Model Aviation time asked Id willing author safety column first reaction Id give best shot doubted could come up enough safety-related topics make beyond year Fortunately read ers column have responded let ters some clubs supply newslet ters Both readers clubs have provided invaluable source material column based quote popular com mercial wine cooler beverage thank support whether can complete second decade remains seen Dogs No Im referring ratty models frequently see club flying field concerns four-legged variety opinion should seen frolicking around flying fieldbut may also risk injury modeling activities home July 1989 issue Tiger Rag newsletter Coeur dAlene Aeromodelers Society CAMS sent its editor think Bill Wood Bill suggested might inter ested article issue titled Pooch Safety read follows constantly reminded about need safety precautions protect property other fliers spectators No article mentions pets Heres couple contributions news letter should make consider safety pre cautions have pets first starts off engine test stand mounted sawhorse running 05 48 Master Airscrew 12 x 5 prop full throttle sitting another sawhorse set parallel test stand head down adjusted mixture control glanced up saw little dog walking straight toward nose no eight inches prop obviously couldnt see reached over test stand pulled whole rig over toward process sawhorse sitting tipped over backwards prop hit knee giving three deep gouges got wounded exercise dog walked full-throttle prop would have killed second tells tale club swap meet bought pack #11 X-Acto blades Ken Crites fire sale box watersoaked some blades rusted got home sorted out blades threw rusty ones garbage next morning breakfast table wife said Whats ledi black Lab pup chewing thats making carpet red got down knees checked pups mouth found three #11 X-Acto blades mouth chopped up have ever owned black Lab pup will know chew up swallow anything doesnt fight back So off vet gofast Seventy-eight bucks later find X-rays show no X-Acto blades innards Obviously very careless disposal blades got shop picked up off floor Moral Protect pet harm know less about what ing look Out Staying subject canine safety its September 1989 issue another model airplane publication contained several photoraphs dog chasing low-flying about two-foot altitude model photos dog appeared just about chomp down fuselage model across picture cap tion RCFun whole family Maybe fun both flier dog since dog lucky didnt get hit prop according accompanying text dur ing low pass dog slammed model ground both dog model survived latter requiring some repairs Ill leave up guess feel about type ac tivity insist taking dog fly ing field suggest keep leash Electric fuel pumps September 1989 col umn asked readers opinions whether safe use electric fuel pump dispense gas oline model expected see lot letters subject two readers sent opinions diametrically op posed reason brought up issue first place stems phone call Bill Cann member NVRC longtime friend wanted know received letters con cerning possible hazard using electric fuel pumps dispense gasoline recently took look Bills setup conContinued page 16 14 Model Aviation Use electric fuel pumps gaso fr BA ENOLAcW ThAT YCLL R1N ThE tOCr DOES 4E 1441/E Tt E CJTCTOA Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose STITS PLAYBOY 113 SCALE 88 40-50 2 cycle 4 channel 455-5 lbs Balsa Foam & Balsa Balsa Reg Price $9695 valid other offer coupon SPECIFICATIONS Engine size Radio Weight Fuselage Wing Tail Section Cowl Epoxy Glass e molded Balsa & necessary hardware included Over two years design development have gone 050 Weasel YOU mind detailed easy understand instruction make Weasel quick build fun fly Advanced Sport Fattern flyers will appreciate excellent flying characteristics ability customize airframe suit eye need Weasel can pour power tear up sky pull back cruise afternoon away Designed & Engineered RC DESIGNS 75 Price Drive Wilmington Ohio 45177 5133822158 Hrs 4-a pm Mon-Fri Terms US ocrency vviy ucceel MusterCard & Vise 00s $300 PP $400 $350 Havdhvt Ohix resideets add 5% seles tac 12-6 pm Saturdays sists automobile fuel pump mounted top one-gallon metal fuel can pump body inside can Electric power supplied pump via wires about four feet long permanently attached pump terminals Banana plugs other end wires con nect pump power panel Bills field box seemed like pretty safe arrangement However recent letter John Brassner ap pears have different opinion John La Mesa CA concerned spark pumps on/off switch could ig nite gasoline vapors letter stated RCers use power panel control electric fuel pumps opinion would safe practice gasoline least two reasons First power panel fuel container usually mounted flight box either right next other within few inches other Clearly spark power panels pump switch could easily ignite gasoline vapors adjacent gas can Second some other switching device used does seem likely would located safe distance gas can aircraft being fueled conclusion does seem automo bile fuel pump itself would safe fueling model aircraft danger vapor ignition arcing on/off switch very high John also pointed out same hazard could presented electric starter other electrical device operated vicin ity gasoline cannot disagree Johhs opin ion unsealed switch motor located close proximity can containing gasoline Con yinued page 18 old timer perfectly proportioned modeling Curtiss Robin 049 Engines -channel RIC 41 Wingspan Electric Power Optional $2295 Oi em3 very law tell scale aimratt ideally sailed medal night aa appealing old cartisa ReSin spruce ana linen age beaetitully pwpertioned rubber electric er glow engines Easy end Ian build trainer-like performance Flyllee Medals Catalog 50Photo 703 273wta INE MODELS INC RO Boa 2136 Fairfax VirgInIa 22031 USA - HOBBY SHOP JET bust completely finished authentically detailed poseable 1/8 scale Ifl QOenierpr~se2051 224-4170 Wp o box 5631tresno cx 93755 16 Model Aviation MUNUUUUIL UA 114 SCALE 96 WACO UPF-7 1/5 SCALE 72 HOLIDAY $8495 SPECIAL BALSA SHEETS 36 48 30 16233 332240 18243 318249 14 258 132337 1 20337 1 1633749 31 33234458 37 18 35471 45 31636282 55 14 37395 81 518385110 38388124 71 12 3110155 34 3165191 1 1645878 48 33247094 58 1848010688 916493122 75 144110134 84 984165225139 12 4225281 MATCHED SHUTS 42 3324100 154108 3184120 144131 BALSA STICKS 3645 1161409 1163810 1161214 3321410 332 3812 3321216 181005 18141118 18381218 18121024 3163161118 316 351720 316 122230 14141624 14 381926 4122130 14343444 14 14055 5165162128 38 382737 38123246 36 344255 38 15270 12123653 12344662 12 15878 58 584885 34 346790 V BALSA TRIANGL ES 36 29 8830 35 45 55 BALSA PLANKS36 58 00 1480 1123275 1124360 22225 23325 24435 33495 34688 TAPERED SHEETS 36 14265 14385 38268 38398 123120 LONE STAR EPOXY 9 oL51895 Sw,598 16,,598 30n,r598 U 3] 11 ~ IZ1AA ~OEU CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 4-6 LB WOOD36 1323 53 120353 1163 53 332363 18377 316389 i43104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 384236 124322 TRAILING EDGE 36 14132 51611439 3611246 12270 INSTANT GLUE 1o 75ck 298 1 v Oh, 298 2vi TOcI 550 2v 11, 580 must try 4-6 lb balsa * NEW * Hundreds rt8W sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 3648 18 181725 18 142026 18 382232 3163162838 14 143450 14 3184055 14 124585 38 3S4989 38128077 12126888 12347597 SPRUCE TRIANGLES 38 38 1212 3434 LflI Pt Y48 18x6 18 x 12 14x6 14 x 12 BASSWOOD48 31631626 3161430 3163838 3161246 3163460 141442 143843 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 20-116336698 201 16436 1035 20332336 865 15332436 955 1618336 735 1518436 695 15316336 928 10316436 835 101 4336655 1014436 930 103/8336870 5384 36 655 512336 540 5124361080 10332 446 885 51/8448500 5316 448680 514448 845 _________ I HARD MAPLE 1438 3835 3812 3834 1234 BIRCH DOWELS 18 316 516 38 16 40 45 50 58 68 36 09 14 26 32 PLY8IRCU 48 184x12835 132x12475 118x12475 18x12495 5 PLYUIRCH 48 332x12700 18n12775 36316x12625 4714x12625 6438x12725 8112x12900 GROOVED LG MOUNTS 12 MehS 383418/40 38341532140 2 16146 175 350 275 550 LONE STAR MODELS Cant Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO 1623 57th St Lubbock IX 79412 Stntm Weaccept Visa Mastercard personal cheeks coo 614% tax Texas US currency Minimum Wood Order $1000 Tgi hobby pe am Kits P& W ModelService 1938 MisS America 84$7196 1936 Buccaneer 84 $8998 1937 Dallaire 108$7516 1838 Clipper Mk 72 $4156 1838 lOud King 63$4236 1938 PowerhouSe 84 $5386 1939 Record Breaker 96$6956 1939 Trenton Terror 7254076 1839 Korda Wake 44$1916 1939 Mercury 72 $5836 1939 Zipper 54$8356 1940 Ranger 46 $3798 1940 Sailplane 78 58476 1940 So Long 50 $3036 1841 Brigidier 56 $4076 1841 Super Quaker 78 $7276 1941 PlayboyJr54 $3116 1841 PlayboySr80 $5116 1941 Brooklyn 0040Cr56 $4236 Midway Model Co Full Kits 1936 Flying Osaker 84$64761938 PowerhouSe 50 $2996 1937 Long Cabin 78$47181939 T Spodner 50 $2996 1937 Quaker Flash 67$45561948 Buzzard Bombnhell l937AirChiet6l$3596 2opelkh $5896 l94ONewRaler74$7116 0tpankk 3096 Thc ubove kits qualify Sam events PP & R/C feature highest quality machine cut & sanded parts sheet & snip wood wire & window material Most plans original PP models easily convertible Sch R/C SaIplanes Electric Power Gas Kits MIDWAY MODEL COELECTRIC MODEL DESIGN Gnome 1-ILO 60$2400Sky Knight 44 05 DI$2400 Gnome2M Gsder79$3796ElectraGlde II 73 05D$3100 Fast Edde 05 D $2480 Lightning 36 09 0 $2400 UtmMkiV 10661 $3796 TttermcTruneller OSOorO $3100 Electric Playboy 05 GI $2600 Hobby Horn Senanar Girder 78 lot 05 electric $1800 Astro ChulleIrger 05 Geared $3250 Astro Viking 85 Geared $3250 Astre Portedield 1150120 Geared $5998 Astro SpaS 37 05 Direct $2996 Daneyn Robin 05 Geared $3371 Daveys Le Crate 05 Gearetll $3596 FULL LINE OF ELECTRIC SYSTEMS & PARTS AVAIL SHIPPINO & I4ANOLINO76 Page CATALOGUE Upto $800 4014 5200$206 pp/lot Class free $801 $2000 add $250when requested order $2001 $4500 add $325 $4501 $7000 add $375HOBBY HORN Ooer $7006 add $450 CA Addressees add 8% tao Send 3 MOran St [A MO VISA / MC 8 5 Eop Check llox 2212 allOw up 1030 days br checkWestminster Ca 92684 clearuoce 993-8311 COD t charges pius $150Hra Mon-Fri 9AM 5PM handling CasS Only possibility spark Could ignite gas oline vapor However opposite opinion expressed letter JD Tison Bradley IL JD son involved automobile drag rac ing over 15 years have auto parts speed equipment company called Engine Mas ters JD has also modeling 56 years prize possession currently scratchbuilt 104-in-span PT-19 sketch flight box accompanied let ter shows electric fuel pump Honda mounted end box power panel other gasoline can mounted flight box stands ground remote box fuel can to-pump pump-to-model flows through automotive vacuum hoses JD reports no prob lems arrangement seems can safely use elec tric pump dispense gasoline model keep fuel can model being fueled well away sources electrical arcs However dont want redesign flight box suggest take look new Du-Bro Model F/P 491 handoperated plunger-type fuel pump mounts neatly cap either plastic metal fuel can Only plunger fuel outlet ex posed According Du-Bro stroke pump will dispense ounce fuel pump claimed work well either glow diesel gasoline fuels Fuel containers Continuing subject fueling systems lets turn electric pumps containers Which type container safer metal plastic question posed September column Ellis McGaughy Con finued page 20 18 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE CoIl 18061745 6394 lOam 6pmCeatralTime rWARBIRDS rate home ofliceor shop ouroutstnsdisg Warbird plaques 39 styles choose trom 6406 actually 3-view drawing has screened 004 metal plate placed 9 X 12 plaque cut key hole slot mount Ilash wall Only $1490 na tour br $4995 delivered via UPS prepaid Available gold silver Please specily color plane names Order direct Send check money order Visa/Mastercard namber enpiraSon date No hassle money back guarantee P-380 AircobraP51-u ikbuurangFJ-4 Fury 8-1000 FlyingF9F-S CougarF-OA 86 Freedom FortressHawker Fighter B-28A Super HurricaneF-840 Thundvrjet FortreanHawkerF- 1050 Thunder P400 Warhawk Sea Fury Chief 582C-3 HelldiverJunkers StukaF-470 Thunderbolt Mosquito B4F86F-lo4JStarhghterSikorsky Sea Sat C-t24CP-38J LightningSpitfire GlohemasterP-SOB ShootingF4U-tO Corsair Oouglas OC-3 StarF-BE Crusader F40-t SkyrayA-tJSkyraderFokkerl3-VII DouglasSkyhawk IISopwith Camel DauntleasldeuaeruchmirrSPAD 13C Focke Wull tgt2GMig 25 FoxhatNewport 17 C-I F6F-3 HellcatF-880 SabreF9F-2 Searcat also have award plaques available tsr R/C F/F C/ br contesla Write br tree brochure Prices start $795 includes engraving shipping costa achve modelers will treat rightl Jim & Mary Jennings AMA 891 396 JENNINGS PRODUCTS DEPT MA-i OX 1121 HENDERSONVILLE TN 37977-1121 16151 824-0475 HOT STUFF Leading way 20 years last C C 0 0 0 0 5 O 00 CO 0 0 Pilot wwI Civ/Spoi WWII 1995 Add $3ir item Califorriiots add 8aI8 M9@ enterpriseS po box 5631fresno calif93755 209 2244170 ______________ u11 Figure 1/6 scale $2995 2995 3750 responded Ellis chemical engineer employed Charleston WV chemical com pany has modeling some 15 years following say Up front let say have come conclusion metal safer though plas tic has its virtues 'Methanol well gasoline must treated respect Methanol has two key char acteristics remember good other bad Methanol electrically conductive fore cannot build hold static charge could provide source ignition property holds true liquid has nothing container liquid stored container electrically nonconduc tive can cause spark due static electricity bad property methanol related fuel/air mixture generated room temperature worst possible explosions occur flammable vapor present stoichiometric pro portions oxygen simply means exact amount air required burn fuel present too lean too rich vapor pressure methanol such very nearly creates proper mixture room temperature Therefore extremely explosive mixture exists fuel containers controllable factor prevents explosion absence ignition source Industry typi cally uses nitrogen inerting extensive equip ment grounding ensure explosion doesnt occur trogen inerting practical purposes work safety standards allow stor age flammable materials plastic containers larger gallon restriction because Continued page 22 20 Model Aviation RADIO CONTROL SNORT KIT AMERICAN P40 Tomahawk TO 45 ENGINES WING SPAN 55 FLIES LIKE DREAM WITH PLENTY OF WING AND TAIL AREA FOR FULL-RANGE POSITIVE CONTROL DESIGNED WITH FOAM WING AND BOX FRAME FUSELAGE FOR SIMPLE AND STURDY CONSTRUCTION WE FURNISH THE ESSENTIAL PARTS ALONG WITH EASY-TO-FOLLOW PLANS AND LET THE BUILDER SELECT HIS OWN WOOD AND ADDITIONAL HARDWARE SNORT KIT INCLUDES PRECISION CUT ARCOFOAM WING CORES ABS HIGH-IMPACT COWLING FORMED WING GUN PORTS AND EXHAUST CRYSTAL CLEAR CANOPY WITH FRAMEWORK PLYWOOD FIREWALL LANDING GEAR STRAPS BLOCKS AND SCREWS FORMED STEEL ENGINE MOUNT CONTROL SURFACE HINGES CLEAR PLANS WITH CONSTRUCTION DETAILS AND ALL NECESSARY TEMPLATES BILL OF MATERIALS NO BALSA INCLUDED ORDERING StND CHECI OR MONEY ORDER FOP S3750 PLUS 450 POSTAGE CANADIANS ADD 650 TO WING Mfg 306 E Simmons Galesburg IL 61401 IL RtS ADD 6% SALES TAX ALL ORDERS MUST St IN US FUNDS StND 400 FOR PRODUCT CATALOG DESCRIBING OUR COMPLtTt LINE OP FOAM CORt REPLACEMtNT WINGS ACCESSORIES KITS TOOLS AND MUCH MORE 309-342-3009 Satellite ityPO BOX 836 SIMI VALLEY CALIFORNIA 93062PHONE 805 522-0062 plastic nonconductive can therefore cause static electrical discharge addition metal con tainers larger gallon should grounded prior filling emptying Most people realize importance grounding because absence visible grounding wire till ing ones automobile gasoline Actually grounding wire inside gasoline hose prevents possibility arcing electrical insulating property plastic al lows static develop also reduces prob ability accidentally shorting out batteries feel field box properly designed ie batteries located away fuel container wiring good condition hazard small have installed kill switch near 12-volt battery tripped off whenever field box use switch mounted location such cannot accidentally bumped would very difficult young child operate does safe guard help prevent fuel fires also prevents accidents related various electrical com ponents use Since us keep fuel containers hav ing capacities gallon less static dis charge may primary consideration making decision whether use metal can plastic bottle However other considerations localized hot spot like mis placed soldering iron cigarette will quickly cause failure plastic bottle plastic con tainer contact retaining strap other sharp object likely fail metal can used summary prefer metal fuel containers due durability inability create static charges Ideally container should safety can listed Underwriters Laboratories Inc approved Factory Mutual Engineering Corpo ration cans utilize spring-loaded lid de signed relieve internal pressure safely subjected fire exposure type safety container used feel advantages metal outweigh explosion hazard due fire exposure Metal containers help prevent fire starting first place Since Ellis seems have covered metalversus-plastic issue some depth dont believe necessary add further com ments Engine backfire fire Jessie Aronstein Pough keepsie NY sent page Flight-Line newsletter Mid-Hudson RC Club editor Donald Roy contained report incident experienced Mike Tebolt has happened daresay other readersthe backfire fire Read trying get 049 engine started Sailplane primer fuel run down power pod over plane en gine sputtered backfired spilled fuel caught fire Now dont know al cohol fire tough see dont know what part plane hold marshmallow over get properly cooked Mike able see parts plane burning because MonoKote tight ened up nicely too much developed holes increasing size Although no fire extinguishers field lostthere enough members field full hot air managed put out flames no structural damage Mike 22 Model Aviation Power easy starting power Smooth take offs power intricate maneuvers Red Max makes engine came alive power performance never expected can have power Its phone call away Power today next running power fully other _____ 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics _____ other fuel $231 ________ $309 ___ $388 _________ Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL iN QTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free qts gals No hand ling charge Freight collect drums Deduct 3% prepay Mix qty Total ty deter mines price sC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD ICOD add $2 per cartonl Personal checks may held until cleared OTYFUELiGAL 4GAL24GAL6OGAL12BGaI 154 GAL 1TOTAL$ ordered MIXTUREID RUMAMT RED MAX PREMIUM FUELI fuel beginners ft sport fiyere should use Avali synthetic castor blend RED MAX 0 RED MAX 5 RED MAX 10 RED MAX 12 RED MAX 15 $999$749$729$889$599$150 $1152$884$841$772$691$212 $1288$955$939$862$772$256 $1372$1029$1002$919$823$301 $1458$1094$1065$977$875$336 RED MAXRACINGFUEL Trophy winner planes boats ft cars two boat biends castor ok up 40 REDMAX2O$1775$1332$1296$1190$1065$464 RED MAX 26$1956$1474$1435$1317$1179$541 RED MAX 40$2539$1905$1854$1701$1524$774 REDMAX50$2922$2192$2133$1956$1753$929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 5653497$2622$2552$2343$2098$1162 RED MAX 4-CYCLE FUEL Eliminates datonation ft kickback 4-cycie engines smoother idie ft mon power 10-4CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1156 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1155 $1056 $950 RED MAX PERFORMANCE FUELI High flash point heavy oil use tuned pipes ducted fan ft other heavy dty app RED MAX FUEL Continued page 156 5 Performance$1200$900$876$804$720 10 Performance $1391$1043$1016$932$835 15 Performance 51583 $1187 $1155 $1060 $950 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps snd tunsci pipes 5Panern$1195$ 895 $ 870 $ 795 $695 10 Panern$1375$1035 $1009 $ 925 $825 iSPanern$1575 $1175 $1145 $1050 $940 SUPER TIGER 3000 FUEL Best fuel Super Tiger 2900-4000 engines ......SuperTiger3000 $1288 $965 $939 $862 $772$256 nitro week next year Red Maxs secret gredients keep engine last ing longer $225 ________ $299 _________ $375 ________ Grand Total RED MAX DIESEL FUEL Superior diesei back iist popuier demand customers Bail Bearings $1767 $1326 $1290 $1184 $1050 DieeelPfakr6eeriigs$1867 $1426 $1390 $1284 $11 50 SMOKER FLUID beet smoker fiuid 2 end 4 cycie engines Smoker Fiuld$1256 $965 $939 $862 $772$266 CUSTOM BLENDED FUEL INC RDIENTS Avatiabie type engine use Caii price Mm gaiion boats-cars-heIicoptersspeed-pstternscaie-A scaie-kavan-gnition-st3000 PLEASE PRINT CiTY STATE ZiP CARD TYPE AND NC EXPIRATION DATE GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 14, 16, 18, 20, 22, 156
line Powered mod els pets dont mix Fuel containers metal plastic best Engine back fire fires LONG agoin January l980 issue magazinemy first safety column appeared So finish column Safety Comes First will have finished its first decade print short math skills thats 120 dividual columns Bill Winter editor Model Aviation time asked Id willing author safety column first reaction Id give best shot doubted could come up enough safety-related topics make beyond year Fortunately read ers column have responded let ters some clubs supply newslet ters Both readers clubs have provided invaluable source material column based quote popular com mercial wine cooler beverage thank support whether can complete second decade remains seen Dogs No Im referring ratty models frequently see club flying field concerns four-legged variety opinion should seen frolicking around flying fieldbut may also risk injury modeling activities home July 1989 issue Tiger Rag newsletter Coeur dAlene Aeromodelers Society CAMS sent its editor think Bill Wood Bill suggested might inter ested article issue titled Pooch Safety read follows constantly reminded about need safety precautions protect property other fliers spectators No article mentions pets Heres couple contributions news letter should make consider safety pre cautions have pets first starts off engine test stand mounted sawhorse running 05 48 Master Airscrew 12 x 5 prop full throttle sitting another sawhorse set parallel test stand head down adjusted mixture control glanced up saw little dog walking straight toward nose no eight inches prop obviously couldnt see reached over test stand pulled whole rig over toward process sawhorse sitting tipped over backwards prop hit knee giving three deep gouges got wounded exercise dog walked full-throttle prop would have killed second tells tale club swap meet bought pack #11 X-Acto blades Ken Crites fire sale box watersoaked some blades rusted got home sorted out blades threw rusty ones garbage next morning breakfast table wife said Whats ledi black Lab pup chewing thats making carpet red got down knees checked pups mouth found three #11 X-Acto blades mouth chopped up have ever owned black Lab pup will know chew up swallow anything doesnt fight back So off vet gofast Seventy-eight bucks later find X-rays show no X-Acto blades innards Obviously very careless disposal blades got shop picked up off floor Moral Protect pet harm know less about what ing look Out Staying subject canine safety its September 1989 issue another model airplane publication contained several photoraphs dog chasing low-flying about two-foot altitude model photos dog appeared just about chomp down fuselage model across picture cap tion RCFun whole family Maybe fun both flier dog since dog lucky didnt get hit prop according accompanying text dur ing low pass dog slammed model ground both dog model survived latter requiring some repairs Ill leave up guess feel about type ac tivity insist taking dog fly ing field suggest keep leash Electric fuel pumps September 1989 col umn asked readers opinions whether safe use electric fuel pump dispense gas oline model expected see lot letters subject two readers sent opinions diametrically op posed reason brought up issue first place stems phone call Bill Cann member NVRC longtime friend wanted know received letters con cerning possible hazard using electric fuel pumps dispense gasoline recently took look Bills setup conContinued page 16 14 Model Aviation Use electric fuel pumps gaso fr BA ENOLAcW ThAT YCLL R1N ThE tOCr DOES 4E 1441/E Tt E CJTCTOA Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose STITS PLAYBOY 113 SCALE 88 40-50 2 cycle 4 channel 455-5 lbs Balsa Foam & Balsa Balsa Reg Price $9695 valid other offer coupon SPECIFICATIONS Engine size Radio Weight Fuselage Wing Tail Section Cowl Epoxy Glass e molded Balsa & necessary hardware included Over two years design development have gone 050 Weasel YOU mind detailed easy understand instruction make Weasel quick build fun fly Advanced Sport Fattern flyers will appreciate excellent flying characteristics ability customize airframe suit eye need Weasel can pour power tear up sky pull back cruise afternoon away Designed & Engineered RC DESIGNS 75 Price Drive Wilmington Ohio 45177 5133822158 Hrs 4-a pm Mon-Fri Terms US ocrency vviy ucceel MusterCard & Vise 00s $300 PP $400 $350 Havdhvt Ohix resideets add 5% seles tac 12-6 pm Saturdays sists automobile fuel pump mounted top one-gallon metal fuel can pump body inside can Electric power supplied pump via wires about four feet long permanently attached pump terminals Banana plugs other end wires con nect pump power panel Bills field box seemed like pretty safe arrangement However recent letter John Brassner ap pears have different opinion John La Mesa CA concerned spark pumps on/off switch could ig nite gasoline vapors letter stated RCers use power panel control electric fuel pumps opinion would safe practice gasoline least two reasons First power panel fuel container usually mounted flight box either right next other within few inches other Clearly spark power panels pump switch could easily ignite gasoline vapors adjacent gas can Second some other switching device used does seem likely would located safe distance gas can aircraft being fueled conclusion does seem automo bile fuel pump itself would safe fueling model aircraft danger vapor ignition arcing on/off switch very high John also pointed out same hazard could presented electric starter other electrical device operated vicin ity gasoline cannot disagree Johhs opin ion unsealed switch motor located close proximity can containing gasoline Con yinued page 18 old timer perfectly proportioned modeling Curtiss Robin 049 Engines -channel RIC 41 Wingspan Electric Power Optional $2295 Oi em3 very law tell scale aimratt ideally sailed medal night aa appealing old cartisa ReSin spruce ana linen age beaetitully pwpertioned rubber electric er glow engines Easy end Ian build trainer-like performance Flyllee Medals Catalog 50Photo 703 273wta INE MODELS INC RO Boa 2136 Fairfax VirgInIa 22031 USA - HOBBY SHOP JET bust completely finished authentically detailed poseable 1/8 scale Ifl QOenierpr~se2051 224-4170 Wp o box 5631tresno cx 93755 16 Model Aviation MUNUUUUIL UA 114 SCALE 96 WACO UPF-7 1/5 SCALE 72 HOLIDAY $8495 SPECIAL BALSA SHEETS 36 48 30 16233 332240 18243 318249 14 258 132337 1 20337 1 1633749 31 33234458 37 18 35471 45 31636282 55 14 37395 81 518385110 38388124 71 12 3110155 34 3165191 1 1645878 48 33247094 58 1848010688 916493122 75 144110134 84 984165225139 12 4225281 MATCHED SHUTS 42 3324100 154108 3184120 144131 BALSA STICKS 3645 1161409 1163810 1161214 3321410 332 3812 3321216 181005 18141118 18381218 18121024 3163161118 316 351720 316 122230 14141624 14 381926 4122130 14343444 14 14055 5165162128 38 382737 38123246 36 344255 38 15270 12123653 12344662 12 15878 58 584885 34 346790 V BALSA TRIANGL ES 36 29 8830 35 45 55 BALSA PLANKS36 58 00 1480 1123275 1124360 22225 23325 24435 33495 34688 TAPERED SHEETS 36 14265 14385 38268 38398 123120 LONE STAR EPOXY 9 oL51895 Sw,598 16,,598 30n,r598 U 3] 11 ~ IZ1AA ~OEU CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 4-6 LB WOOD36 1323 53 120353 1163 53 332363 18377 316389 i43104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 384236 124322 TRAILING EDGE 36 14132 51611439 3611246 12270 INSTANT GLUE 1o 75ck 298 1 v Oh, 298 2vi TOcI 550 2v 11, 580 must try 4-6 lb balsa * NEW * Hundreds rt8W sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 3648 18 181725 18 142026 18 382232 3163162838 14 143450 14 3184055 14 124585 38 3S4989 38128077 12126888 12347597 SPRUCE TRIANGLES 38 38 1212 3434 LflI Pt Y48 18x6 18 x 12 14x6 14 x 12 BASSWOOD48 31631626 3161430 3163838 3161246 3163460 141442 143843 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 20-116336698 201 16436 1035 20332336 865 15332436 955 1618336 735 1518436 695 15316336 928 10316436 835 101 4336655 1014436 930 103/8336870 5384 36 655 512336 540 5124361080 10332 446 885 51/8448500 5316 448680 514448 845 _________ I HARD MAPLE 1438 3835 3812 3834 1234 BIRCH DOWELS 18 316 516 38 16 40 45 50 58 68 36 09 14 26 32 PLY8IRCU 48 184x12835 132x12475 118x12475 18x12495 5 PLYUIRCH 48 332x12700 18n12775 36316x12625 4714x12625 6438x12725 8112x12900 GROOVED LG MOUNTS 12 MehS 383418/40 38341532140 2 16146 175 350 275 550 LONE STAR MODELS Cant Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO 1623 57th St Lubbock IX 79412 Stntm Weaccept Visa Mastercard personal cheeks coo 614% tax Texas US currency Minimum Wood Order $1000 Tgi hobby pe am Kits P& W ModelService 1938 MisS America 84$7196 1936 Buccaneer 84 $8998 1937 Dallaire 108$7516 1838 Clipper Mk 72 $4156 1838 lOud King 63$4236 1938 PowerhouSe 84 $5386 1939 Record Breaker 96$6956 1939 Trenton Terror 7254076 1839 Korda Wake 44$1916 1939 Mercury 72 $5836 1939 Zipper 54$8356 1940 Ranger 46 $3798 1940 Sailplane 78 58476 1940 So Long 50 $3036 1841 Brigidier 56 $4076 1841 Super Quaker 78 $7276 1941 PlayboyJr54 $3116 1841 PlayboySr80 $5116 1941 Brooklyn 0040Cr56 $4236 Midway Model Co Full Kits 1936 Flying Osaker 84$64761938 PowerhouSe 50 $2996 1937 Long Cabin 78$47181939 T Spodner 50 $2996 1937 Quaker Flash 67$45561948 Buzzard Bombnhell l937AirChiet6l$3596 2opelkh $5896 l94ONewRaler74$7116 0tpankk 3096 Thc ubove kits qualify Sam events PP & R/C feature highest quality machine cut & sanded parts sheet & snip wood wire & window material Most plans original PP models easily convertible Sch R/C SaIplanes Electric Power Gas Kits MIDWAY MODEL COELECTRIC MODEL DESIGN Gnome 1-ILO 60$2400Sky Knight 44 05 DI$2400 Gnome2M Gsder79$3796ElectraGlde II 73 05D$3100 Fast Edde 05 D $2480 Lightning 36 09 0 $2400 UtmMkiV 10661 $3796 TttermcTruneller OSOorO $3100 Electric Playboy 05 GI $2600 Hobby Horn Senanar Girder 78 lot 05 electric $1800 Astro ChulleIrger 05 Geared $3250 Astro Viking 85 Geared $3250 Astre Portedield 1150120 Geared $5998 Astro SpaS 37 05 Direct $2996 Daneyn Robin 05 Geared $3371 Daveys Le Crate 05 Gearetll $3596 FULL LINE OF ELECTRIC SYSTEMS & PARTS AVAIL SHIPPINO & I4ANOLINO76 Page CATALOGUE Upto $800 4014 5200$206 pp/lot Class free $801 $2000 add $250when requested order $2001 $4500 add $325 $4501 $7000 add $375HOBBY HORN Ooer $7006 add $450 CA Addressees add 8% tao Send 3 MOran St [A MO VISA / MC 8 5 Eop Check llox 2212 allOw up 1030 days br checkWestminster Ca 92684 clearuoce 993-8311 COD t charges pius $150Hra Mon-Fri 9AM 5PM handling CasS Only possibility spark Could ignite gas oline vapor However opposite opinion expressed letter JD Tison Bradley IL JD son involved automobile drag rac ing over 15 years have auto parts speed equipment company called Engine Mas ters JD has also modeling 56 years prize possession currently scratchbuilt 104-in-span PT-19 sketch flight box accompanied let ter shows electric fuel pump Honda mounted end box power panel other gasoline can mounted flight box stands ground remote box fuel can to-pump pump-to-model flows through automotive vacuum hoses JD reports no prob lems arrangement seems can safely use elec tric pump dispense gasoline model keep fuel can model being fueled well away sources electrical arcs However dont want redesign flight box suggest take look new Du-Bro Model F/P 491 handoperated plunger-type fuel pump mounts neatly cap either plastic metal fuel can Only plunger fuel outlet ex posed According Du-Bro stroke pump will dispense ounce fuel pump claimed work well either glow diesel gasoline fuels Fuel containers Continuing subject fueling systems lets turn electric pumps containers Which type container safer metal plastic question posed September column Ellis McGaughy Con finued page 20 18 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE CoIl 18061745 6394 lOam 6pmCeatralTime rWARBIRDS rate home ofliceor shop ouroutstnsdisg Warbird plaques 39 styles choose trom 6406 actually 3-view drawing has screened 004 metal plate placed 9 X 12 plaque cut key hole slot mount Ilash wall Only $1490 na tour br $4995 delivered via UPS prepaid Available gold silver Please specily color plane names Order direct Send check money order Visa/Mastercard namber enpiraSon date No hassle money back guarantee P-380 AircobraP51-u ikbuurangFJ-4 Fury 8-1000 FlyingF9F-S CougarF-OA 86 Freedom FortressHawker Fighter B-28A Super HurricaneF-840 Thundvrjet FortreanHawkerF- 1050 Thunder P400 Warhawk Sea Fury Chief 582C-3 HelldiverJunkers StukaF-470 Thunderbolt Mosquito B4F86F-lo4JStarhghterSikorsky Sea Sat C-t24CP-38J LightningSpitfire GlohemasterP-SOB ShootingF4U-tO Corsair Oouglas OC-3 StarF-BE Crusader F40-t SkyrayA-tJSkyraderFokkerl3-VII DouglasSkyhawk IISopwith Camel DauntleasldeuaeruchmirrSPAD 13C Focke Wull tgt2GMig 25 FoxhatNewport 17 C-I F6F-3 HellcatF-880 SabreF9F-2 Searcat also have award plaques available tsr R/C F/F C/ br contesla Write br tree brochure Prices start $795 includes engraving shipping costa achve modelers will treat rightl Jim & Mary Jennings AMA 891 396 JENNINGS PRODUCTS DEPT MA-i OX 1121 HENDERSONVILLE TN 37977-1121 16151 824-0475 HOT STUFF Leading way 20 years last C C 0 0 0 0 5 O 00 CO 0 0 Pilot wwI Civ/Spoi WWII 1995 Add $3ir item Califorriiots add 8aI8 M9@ enterpriseS po box 5631fresno calif93755 209 2244170 ______________ u11 Figure 1/6 scale $2995 2995 3750 responded Ellis chemical engineer employed Charleston WV chemical com pany has modeling some 15 years following say Up front let say have come conclusion metal safer though plas tic has its virtues 'Methanol well gasoline must treated respect Methanol has two key char acteristics remember good other bad Methanol electrically conductive fore cannot build hold static charge could provide source ignition property holds true liquid has nothing container liquid stored container electrically nonconduc tive can cause spark due static electricity bad property methanol related fuel/air mixture generated room temperature worst possible explosions occur flammable vapor present stoichiometric pro portions oxygen simply means exact amount air required burn fuel present too lean too rich vapor pressure methanol such very nearly creates proper mixture room temperature Therefore extremely explosive mixture exists fuel containers controllable factor prevents explosion absence ignition source Industry typi cally uses nitrogen inerting extensive equip ment grounding ensure explosion doesnt occur trogen inerting practical purposes work safety standards allow stor age flammable materials plastic containers larger gallon restriction because Continued page 22 20 Model Aviation RADIO CONTROL SNORT KIT AMERICAN P40 Tomahawk TO 45 ENGINES WING SPAN 55 FLIES LIKE DREAM WITH PLENTY OF WING AND TAIL AREA FOR FULL-RANGE POSITIVE CONTROL DESIGNED WITH FOAM WING AND BOX FRAME FUSELAGE FOR SIMPLE AND STURDY CONSTRUCTION WE FURNISH THE ESSENTIAL PARTS ALONG WITH EASY-TO-FOLLOW PLANS AND LET THE BUILDER SELECT HIS OWN WOOD AND ADDITIONAL HARDWARE SNORT KIT INCLUDES PRECISION CUT ARCOFOAM WING CORES ABS HIGH-IMPACT COWLING FORMED WING GUN PORTS AND EXHAUST CRYSTAL CLEAR CANOPY WITH FRAMEWORK PLYWOOD FIREWALL LANDING GEAR STRAPS BLOCKS AND SCREWS FORMED STEEL ENGINE MOUNT CONTROL SURFACE HINGES CLEAR PLANS WITH CONSTRUCTION DETAILS AND ALL NECESSARY TEMPLATES BILL OF MATERIALS NO BALSA INCLUDED ORDERING StND CHECI OR MONEY ORDER FOP S3750 PLUS 450 POSTAGE CANADIANS ADD 650 TO WING Mfg 306 E Simmons Galesburg IL 61401 IL RtS ADD 6% SALES TAX ALL ORDERS MUST St IN US FUNDS StND 400 FOR PRODUCT CATALOG DESCRIBING OUR COMPLtTt LINE OP FOAM CORt REPLACEMtNT WINGS ACCESSORIES KITS TOOLS AND MUCH MORE 309-342-3009 Satellite ityPO BOX 836 SIMI VALLEY CALIFORNIA 93062PHONE 805 522-0062 plastic nonconductive can therefore cause static electrical discharge addition metal con tainers larger gallon should grounded prior filling emptying Most people realize importance grounding because absence visible grounding wire till ing ones automobile gasoline Actually grounding wire inside gasoline hose prevents possibility arcing electrical insulating property plastic al lows static develop also reduces prob ability accidentally shorting out batteries feel field box properly designed ie batteries located away fuel container wiring good condition hazard small have installed kill switch near 12-volt battery tripped off whenever field box use switch mounted location such cannot accidentally bumped would very difficult young child operate does safe guard help prevent fuel fires also prevents accidents related various electrical com ponents use Since us keep fuel containers hav ing capacities gallon less static dis charge may primary consideration making decision whether use metal can plastic bottle However other considerations localized hot spot like mis placed soldering iron cigarette will quickly cause failure plastic bottle plastic con tainer contact retaining strap other sharp object likely fail metal can used summary prefer metal fuel containers due durability inability create static charges Ideally container should safety can listed Underwriters Laboratories Inc approved Factory Mutual Engineering Corpo ration cans utilize spring-loaded lid de signed relieve internal pressure safely subjected fire exposure type safety container used feel advantages metal outweigh explosion hazard due fire exposure Metal containers help prevent fire starting first place Since Ellis seems have covered metalversus-plastic issue some depth dont believe necessary add further com ments Engine backfire fire Jessie Aronstein Pough keepsie NY sent page Flight-Line newsletter Mid-Hudson RC Club editor Donald Roy contained report incident experienced Mike Tebolt has happened daresay other readersthe backfire fire Read trying get 049 engine started Sailplane primer fuel run down power pod over plane en gine sputtered backfired spilled fuel caught fire Now dont know al cohol fire tough see dont know what part plane hold marshmallow over get properly cooked Mike able see parts plane burning because MonoKote tight ened up nicely too much developed holes increasing size Although no fire extinguishers field lostthere enough members field full hot air managed put out flames no structural damage Mike 22 Model Aviation Power easy starting power Smooth take offs power intricate maneuvers Red Max makes engine came alive power performance never expected can have power Its phone call away Power today next running power fully other _____ 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics _____ other fuel $231 ________ $309 ___ $388 _________ Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL iN QTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free qts gals No hand ling charge Freight collect drums Deduct 3% prepay Mix qty Total ty deter mines price sC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD ICOD add $2 per cartonl Personal checks may held until cleared OTYFUELiGAL 4GAL24GAL6OGAL12BGaI 154 GAL 1TOTAL$ ordered MIXTUREID RUMAMT RED MAX PREMIUM FUELI fuel beginners ft sport fiyere should use Avali synthetic castor blend RED MAX 0 RED MAX 5 RED MAX 10 RED MAX 12 RED MAX 15 $999$749$729$889$599$150 $1152$884$841$772$691$212 $1288$955$939$862$772$256 $1372$1029$1002$919$823$301 $1458$1094$1065$977$875$336 RED MAXRACINGFUEL Trophy winner planes boats ft cars two boat biends castor ok up 40 REDMAX2O$1775$1332$1296$1190$1065$464 RED MAX 26$1956$1474$1435$1317$1179$541 RED MAX 40$2539$1905$1854$1701$1524$774 REDMAX50$2922$2192$2133$1956$1753$929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 5653497$2622$2552$2343$2098$1162 RED MAX 4-CYCLE FUEL Eliminates datonation ft kickback 4-cycie engines smoother idie ft mon power 10-4CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1156 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1155 $1056 $950 RED MAX PERFORMANCE FUELI High flash point heavy oil use tuned pipes ducted fan ft other heavy dty app RED MAX FUEL Continued page 156 5 Performance$1200$900$876$804$720 10 Performance $1391$1043$1016$932$835 15 Performance 51583 $1187 $1155 $1060 $950 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps snd tunsci pipes 5Panern$1195$ 895 $ 870 $ 795 $695 10 Panern$1375$1035 $1009 $ 925 $825 iSPanern$1575 $1175 $1145 $1050 $940 SUPER TIGER 3000 FUEL Best fuel Super Tiger 2900-4000 engines ......SuperTiger3000 $1288 $965 $939 $862 $772$256 nitro week next year Red Maxs secret gredients keep engine last ing longer $225 ________ $299 _________ $375 ________ Grand Total RED MAX DIESEL FUEL Superior diesei back iist popuier demand customers Bail Bearings $1767 $1326 $1290 $1184 $1050 DieeelPfakr6eeriigs$1867 $1426 $1390 $1284 $11 50 SMOKER FLUID beet smoker fiuid 2 end 4 cycie engines Smoker Fiuld$1256 $965 $939 $862 $772$266 CUSTOM BLENDED FUEL INC RDIENTS Avatiabie type engine use Caii price Mm gaiion boats-cars-heIicoptersspeed-pstternscaie-A scaie-kavan-gnition-st3000 PLEASE PRINT CiTY STATE ZiP CARD TYPE AND NC EXPIRATION DATE GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 14, 16, 18, 20, 22, 156
line Powered mod els pets dont mix Fuel containers metal plastic best Engine back fire fires LONG agoin January l980 issue magazinemy first safety column appeared So finish column Safety Comes First will have finished its first decade print short math skills thats 120 dividual columns Bill Winter editor Model Aviation time asked Id willing author safety column first reaction Id give best shot doubted could come up enough safety-related topics make beyond year Fortunately read ers column have responded let ters some clubs supply newslet ters Both readers clubs have provided invaluable source material column based quote popular com mercial wine cooler beverage thank support whether can complete second decade remains seen Dogs No Im referring ratty models frequently see club flying field concerns four-legged variety opinion should seen frolicking around flying fieldbut may also risk injury modeling activities home July 1989 issue Tiger Rag newsletter Coeur dAlene Aeromodelers Society CAMS sent its editor think Bill Wood Bill suggested might inter ested article issue titled Pooch Safety read follows constantly reminded about need safety precautions protect property other fliers spectators No article mentions pets Heres couple contributions news letter should make consider safety pre cautions have pets first starts off engine test stand mounted sawhorse running 05 48 Master Airscrew 12 x 5 prop full throttle sitting another sawhorse set parallel test stand head down adjusted mixture control glanced up saw little dog walking straight toward nose no eight inches prop obviously couldnt see reached over test stand pulled whole rig over toward process sawhorse sitting tipped over backwards prop hit knee giving three deep gouges got wounded exercise dog walked full-throttle prop would have killed second tells tale club swap meet bought pack #11 X-Acto blades Ken Crites fire sale box watersoaked some blades rusted got home sorted out blades threw rusty ones garbage next morning breakfast table wife said Whats ledi black Lab pup chewing thats making carpet red got down knees checked pups mouth found three #11 X-Acto blades mouth chopped up have ever owned black Lab pup will know chew up swallow anything doesnt fight back So off vet gofast Seventy-eight bucks later find X-rays show no X-Acto blades innards Obviously very careless disposal blades got shop picked up off floor Moral Protect pet harm know less about what ing look Out Staying subject canine safety its September 1989 issue another model airplane publication contained several photoraphs dog chasing low-flying about two-foot altitude model photos dog appeared just about chomp down fuselage model across picture cap tion RCFun whole family Maybe fun both flier dog since dog lucky didnt get hit prop according accompanying text dur ing low pass dog slammed model ground both dog model survived latter requiring some repairs Ill leave up guess feel about type ac tivity insist taking dog fly ing field suggest keep leash Electric fuel pumps September 1989 col umn asked readers opinions whether safe use electric fuel pump dispense gas oline model expected see lot letters subject two readers sent opinions diametrically op posed reason brought up issue first place stems phone call Bill Cann member NVRC longtime friend wanted know received letters con cerning possible hazard using electric fuel pumps dispense gasoline recently took look Bills setup conContinued page 16 14 Model Aviation Use electric fuel pumps gaso fr BA ENOLAcW ThAT YCLL R1N ThE tOCr DOES 4E 1441/E Tt E CJTCTOA Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose STITS PLAYBOY 113 SCALE 88 40-50 2 cycle 4 channel 455-5 lbs Balsa Foam & Balsa Balsa Reg Price $9695 valid other offer coupon SPECIFICATIONS Engine size Radio Weight Fuselage Wing Tail Section Cowl Epoxy Glass e molded Balsa & necessary hardware included Over two years design development have gone 050 Weasel YOU mind detailed easy understand instruction make Weasel quick build fun fly Advanced Sport Fattern flyers will appreciate excellent flying characteristics ability customize airframe suit eye need Weasel can pour power tear up sky pull back cruise afternoon away Designed & Engineered RC DESIGNS 75 Price Drive Wilmington Ohio 45177 5133822158 Hrs 4-a pm Mon-Fri Terms US ocrency vviy ucceel MusterCard & Vise 00s $300 PP $400 $350 Havdhvt Ohix resideets add 5% seles tac 12-6 pm Saturdays sists automobile fuel pump mounted top one-gallon metal fuel can pump body inside can Electric power supplied pump via wires about four feet long permanently attached pump terminals Banana plugs other end wires con nect pump power panel Bills field box seemed like pretty safe arrangement However recent letter John Brassner ap pears have different opinion John La Mesa CA concerned spark pumps on/off switch could ig nite gasoline vapors letter stated RCers use power panel control electric fuel pumps opinion would safe practice gasoline least two reasons First power panel fuel container usually mounted flight box either right next other within few inches other Clearly spark power panels pump switch could easily ignite gasoline vapors adjacent gas can Second some other switching device used does seem likely would located safe distance gas can aircraft being fueled conclusion does seem automo bile fuel pump itself would safe fueling model aircraft danger vapor ignition arcing on/off switch very high John also pointed out same hazard could presented electric starter other electrical device operated vicin ity gasoline cannot disagree Johhs opin ion unsealed switch motor located close proximity can containing gasoline Con yinued page 18 old timer perfectly proportioned modeling Curtiss Robin 049 Engines -channel RIC 41 Wingspan Electric Power Optional $2295 Oi em3 very law tell scale aimratt ideally sailed medal night aa appealing old cartisa ReSin spruce ana linen age beaetitully pwpertioned rubber electric er glow engines Easy end Ian build trainer-like performance Flyllee Medals Catalog 50Photo 703 273wta INE MODELS INC RO Boa 2136 Fairfax VirgInIa 22031 USA - HOBBY SHOP JET bust completely finished authentically detailed poseable 1/8 scale Ifl QOenierpr~se2051 224-4170 Wp o box 5631tresno cx 93755 16 Model Aviation MUNUUUUIL UA 114 SCALE 96 WACO UPF-7 1/5 SCALE 72 HOLIDAY $8495 SPECIAL BALSA SHEETS 36 48 30 16233 332240 18243 318249 14 258 132337 1 20337 1 1633749 31 33234458 37 18 35471 45 31636282 55 14 37395 81 518385110 38388124 71 12 3110155 34 3165191 1 1645878 48 33247094 58 1848010688 916493122 75 144110134 84 984165225139 12 4225281 MATCHED SHUTS 42 3324100 154108 3184120 144131 BALSA STICKS 3645 1161409 1163810 1161214 3321410 332 3812 3321216 181005 18141118 18381218 18121024 3163161118 316 351720 316 122230 14141624 14 381926 4122130 14343444 14 14055 5165162128 38 382737 38123246 36 344255 38 15270 12123653 12344662 12 15878 58 584885 34 346790 V BALSA TRIANGL ES 36 29 8830 35 45 55 BALSA PLANKS36 58 00 1480 1123275 1124360 22225 23325 24435 33495 34688 TAPERED SHEETS 36 14265 14385 38268 38398 123120 LONE STAR EPOXY 9 oL51895 Sw,598 16,,598 30n,r598 U 3] 11 ~ IZ1AA ~OEU CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 4-6 LB WOOD36 1323 53 120353 1163 53 332363 18377 316389 i43104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 384236 124322 TRAILING EDGE 36 14132 51611439 3611246 12270 INSTANT GLUE 1o 75ck 298 1 v Oh, 298 2vi TOcI 550 2v 11, 580 must try 4-6 lb balsa * NEW * Hundreds rt8W sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 3648 18 181725 18 142026 18 382232 3163162838 14 143450 14 3184055 14 124585 38 3S4989 38128077 12126888 12347597 SPRUCE TRIANGLES 38 38 1212 3434 LflI Pt Y48 18x6 18 x 12 14x6 14 x 12 BASSWOOD48 31631626 3161430 3163838 3161246 3163460 141442 143843 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 20-116336698 201 16436 1035 20332336 865 15332436 955 1618336 735 1518436 695 15316336 928 10316436 835 101 4336655 1014436 930 103/8336870 5384 36 655 512336 540 5124361080 10332 446 885 51/8448500 5316 448680 514448 845 _________ I HARD MAPLE 1438 3835 3812 3834 1234 BIRCH DOWELS 18 316 516 38 16 40 45 50 58 68 36 09 14 26 32 PLY8IRCU 48 184x12835 132x12475 118x12475 18x12495 5 PLYUIRCH 48 332x12700 18n12775 36316x12625 4714x12625 6438x12725 8112x12900 GROOVED LG MOUNTS 12 MehS 383418/40 38341532140 2 16146 175 350 275 550 LONE STAR MODELS Cant Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO 1623 57th St Lubbock IX 79412 Stntm Weaccept Visa Mastercard personal cheeks coo 614% tax Texas US currency Minimum Wood Order $1000 Tgi hobby pe am Kits P& W ModelService 1938 MisS America 84$7196 1936 Buccaneer 84 $8998 1937 Dallaire 108$7516 1838 Clipper Mk 72 $4156 1838 lOud King 63$4236 1938 PowerhouSe 84 $5386 1939 Record Breaker 96$6956 1939 Trenton Terror 7254076 1839 Korda Wake 44$1916 1939 Mercury 72 $5836 1939 Zipper 54$8356 1940 Ranger 46 $3798 1940 Sailplane 78 58476 1940 So Long 50 $3036 1841 Brigidier 56 $4076 1841 Super Quaker 78 $7276 1941 PlayboyJr54 $3116 1841 PlayboySr80 $5116 1941 Brooklyn 0040Cr56 $4236 Midway Model Co Full Kits 1936 Flying Osaker 84$64761938 PowerhouSe 50 $2996 1937 Long Cabin 78$47181939 T Spodner 50 $2996 1937 Quaker Flash 67$45561948 Buzzard Bombnhell l937AirChiet6l$3596 2opelkh $5896 l94ONewRaler74$7116 0tpankk 3096 Thc ubove kits qualify Sam events PP & R/C feature highest quality machine cut & sanded parts sheet & snip wood wire & window material Most plans original PP models easily convertible Sch R/C SaIplanes Electric Power Gas Kits MIDWAY MODEL COELECTRIC MODEL DESIGN Gnome 1-ILO 60$2400Sky Knight 44 05 DI$2400 Gnome2M Gsder79$3796ElectraGlde II 73 05D$3100 Fast Edde 05 D $2480 Lightning 36 09 0 $2400 UtmMkiV 10661 $3796 TttermcTruneller OSOorO $3100 Electric Playboy 05 GI $2600 Hobby Horn Senanar Girder 78 lot 05 electric $1800 Astro ChulleIrger 05 Geared $3250 Astro Viking 85 Geared $3250 Astre Portedield 1150120 Geared $5998 Astro SpaS 37 05 Direct $2996 Daneyn Robin 05 Geared $3371 Daveys Le Crate 05 Gearetll $3596 FULL LINE OF ELECTRIC SYSTEMS & PARTS AVAIL SHIPPINO & I4ANOLINO76 Page CATALOGUE Upto $800 4014 5200$206 pp/lot Class free $801 $2000 add $250when requested order $2001 $4500 add $325 $4501 $7000 add $375HOBBY HORN Ooer $7006 add $450 CA Addressees add 8% tao Send 3 MOran St [A MO VISA / MC 8 5 Eop Check llox 2212 allOw up 1030 days br checkWestminster Ca 92684 clearuoce 993-8311 COD t charges pius $150Hra Mon-Fri 9AM 5PM handling CasS Only possibility spark Could ignite gas oline vapor However opposite opinion expressed letter JD Tison Bradley IL JD son involved automobile drag rac ing over 15 years have auto parts speed equipment company called Engine Mas ters JD has also modeling 56 years prize possession currently scratchbuilt 104-in-span PT-19 sketch flight box accompanied let ter shows electric fuel pump Honda mounted end box power panel other gasoline can mounted flight box stands ground remote box fuel can to-pump pump-to-model flows through automotive vacuum hoses JD reports no prob lems arrangement seems can safely use elec tric pump dispense gasoline model keep fuel can model being fueled well away sources electrical arcs However dont want redesign flight box suggest take look new Du-Bro Model F/P 491 handoperated plunger-type fuel pump mounts neatly cap either plastic metal fuel can Only plunger fuel outlet ex posed According Du-Bro stroke pump will dispense ounce fuel pump claimed work well either glow diesel gasoline fuels Fuel containers Continuing subject fueling systems lets turn electric pumps containers Which type container safer metal plastic question posed September column Ellis McGaughy Con finued page 20 18 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE CoIl 18061745 6394 lOam 6pmCeatralTime rWARBIRDS rate home ofliceor shop ouroutstnsdisg Warbird plaques 39 styles choose trom 6406 actually 3-view drawing has screened 004 metal plate placed 9 X 12 plaque cut key hole slot mount Ilash wall Only $1490 na tour br $4995 delivered via UPS prepaid Available gold silver Please specily color plane names Order direct Send check money order Visa/Mastercard namber enpiraSon date No hassle money back guarantee P-380 AircobraP51-u ikbuurangFJ-4 Fury 8-1000 FlyingF9F-S CougarF-OA 86 Freedom FortressHawker Fighter B-28A Super HurricaneF-840 Thundvrjet FortreanHawkerF- 1050 Thunder P400 Warhawk Sea Fury Chief 582C-3 HelldiverJunkers StukaF-470 Thunderbolt Mosquito B4F86F-lo4JStarhghterSikorsky Sea Sat C-t24CP-38J LightningSpitfire GlohemasterP-SOB ShootingF4U-tO Corsair Oouglas OC-3 StarF-BE Crusader F40-t SkyrayA-tJSkyraderFokkerl3-VII DouglasSkyhawk IISopwith Camel DauntleasldeuaeruchmirrSPAD 13C Focke Wull tgt2GMig 25 FoxhatNewport 17 C-I F6F-3 HellcatF-880 SabreF9F-2 Searcat also have award plaques available tsr R/C F/F C/ br contesla Write br tree brochure Prices start $795 includes engraving shipping costa achve modelers will treat rightl Jim & Mary Jennings AMA 891 396 JENNINGS PRODUCTS DEPT MA-i OX 1121 HENDERSONVILLE TN 37977-1121 16151 824-0475 HOT STUFF Leading way 20 years last C C 0 0 0 0 5 O 00 CO 0 0 Pilot wwI Civ/Spoi WWII 1995 Add $3ir item Califorriiots add 8aI8 M9@ enterpriseS po box 5631fresno calif93755 209 2244170 ______________ u11 Figure 1/6 scale $2995 2995 3750 responded Ellis chemical engineer employed Charleston WV chemical com pany has modeling some 15 years following say Up front let say have come conclusion metal safer though plas tic has its virtues 'Methanol well gasoline must treated respect Methanol has two key char acteristics remember good other bad Methanol electrically conductive fore cannot build hold static charge could provide source ignition property holds true liquid has nothing container liquid stored container electrically nonconduc tive can cause spark due static electricity bad property methanol related fuel/air mixture generated room temperature worst possible explosions occur flammable vapor present stoichiometric pro portions oxygen simply means exact amount air required burn fuel present too lean too rich vapor pressure methanol such very nearly creates proper mixture room temperature Therefore extremely explosive mixture exists fuel containers controllable factor prevents explosion absence ignition source Industry typi cally uses nitrogen inerting extensive equip ment grounding ensure explosion doesnt occur trogen inerting practical purposes work safety standards allow stor age flammable materials plastic containers larger gallon restriction because Continued page 22 20 Model Aviation RADIO CONTROL SNORT KIT AMERICAN P40 Tomahawk TO 45 ENGINES WING SPAN 55 FLIES LIKE DREAM WITH PLENTY OF WING AND TAIL AREA FOR FULL-RANGE POSITIVE CONTROL DESIGNED WITH FOAM WING AND BOX FRAME FUSELAGE FOR SIMPLE AND STURDY CONSTRUCTION WE FURNISH THE ESSENTIAL PARTS ALONG WITH EASY-TO-FOLLOW PLANS AND LET THE BUILDER SELECT HIS OWN WOOD AND ADDITIONAL HARDWARE SNORT KIT INCLUDES PRECISION CUT ARCOFOAM WING CORES ABS HIGH-IMPACT COWLING FORMED WING GUN PORTS AND EXHAUST CRYSTAL CLEAR CANOPY WITH FRAMEWORK PLYWOOD FIREWALL LANDING GEAR STRAPS BLOCKS AND SCREWS FORMED STEEL ENGINE MOUNT CONTROL SURFACE HINGES CLEAR PLANS WITH CONSTRUCTION DETAILS AND ALL NECESSARY TEMPLATES BILL OF MATERIALS NO BALSA INCLUDED ORDERING StND CHECI OR MONEY ORDER FOP S3750 PLUS 450 POSTAGE CANADIANS ADD 650 TO WING Mfg 306 E Simmons Galesburg IL 61401 IL RtS ADD 6% SALES TAX ALL ORDERS MUST St IN US FUNDS StND 400 FOR PRODUCT CATALOG DESCRIBING OUR COMPLtTt LINE OP FOAM CORt REPLACEMtNT WINGS ACCESSORIES KITS TOOLS AND MUCH MORE 309-342-3009 Satellite ityPO BOX 836 SIMI VALLEY CALIFORNIA 93062PHONE 805 522-0062 plastic nonconductive can therefore cause static electrical discharge addition metal con tainers larger gallon should grounded prior filling emptying Most people realize importance grounding because absence visible grounding wire till ing ones automobile gasoline Actually grounding wire inside gasoline hose prevents possibility arcing electrical insulating property plastic al lows static develop also reduces prob ability accidentally shorting out batteries feel field box properly designed ie batteries located away fuel container wiring good condition hazard small have installed kill switch near 12-volt battery tripped off whenever field box use switch mounted location such cannot accidentally bumped would very difficult young child operate does safe guard help prevent fuel fires also prevents accidents related various electrical com ponents use Since us keep fuel containers hav ing capacities gallon less static dis charge may primary consideration making decision whether use metal can plastic bottle However other considerations localized hot spot like mis placed soldering iron cigarette will quickly cause failure plastic bottle plastic con tainer contact retaining strap other sharp object likely fail metal can used summary prefer metal fuel containers due durability inability create static charges Ideally container should safety can listed Underwriters Laboratories Inc approved Factory Mutual Engineering Corpo ration cans utilize spring-loaded lid de signed relieve internal pressure safely subjected fire exposure type safety container used feel advantages metal outweigh explosion hazard due fire exposure Metal containers help prevent fire starting first place Since Ellis seems have covered metalversus-plastic issue some depth dont believe necessary add further com ments Engine backfire fire Jessie Aronstein Pough keepsie NY sent page Flight-Line newsletter Mid-Hudson RC Club editor Donald Roy contained report incident experienced Mike Tebolt has happened daresay other readersthe backfire fire Read trying get 049 engine started Sailplane primer fuel run down power pod over plane en gine sputtered backfired spilled fuel caught fire Now dont know al cohol fire tough see dont know what part plane hold marshmallow over get properly cooked Mike able see parts plane burning because MonoKote tight ened up nicely too much developed holes increasing size Although no fire extinguishers field lostthere enough members field full hot air managed put out flames no structural damage Mike 22 Model Aviation Power easy starting power Smooth take offs power intricate maneuvers Red Max makes engine came alive power performance never expected can have power Its phone call away Power today next running power fully other _____ 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics _____ other fuel $231 ________ $309 ___ $388 _________ Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL iN QTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free qts gals No hand ling charge Freight collect drums Deduct 3% prepay Mix qty Total ty deter mines price sC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD ICOD add $2 per cartonl Personal checks may held until cleared OTYFUELiGAL 4GAL24GAL6OGAL12BGaI 154 GAL 1TOTAL$ ordered MIXTUREID RUMAMT RED MAX PREMIUM FUELI fuel beginners ft sport fiyere should use Avali synthetic castor blend RED MAX 0 RED MAX 5 RED MAX 10 RED MAX 12 RED MAX 15 $999$749$729$889$599$150 $1152$884$841$772$691$212 $1288$955$939$862$772$256 $1372$1029$1002$919$823$301 $1458$1094$1065$977$875$336 RED MAXRACINGFUEL Trophy winner planes boats ft cars two boat biends castor ok up 40 REDMAX2O$1775$1332$1296$1190$1065$464 RED MAX 26$1956$1474$1435$1317$1179$541 RED MAX 40$2539$1905$1854$1701$1524$774 REDMAX50$2922$2192$2133$1956$1753$929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 5653497$2622$2552$2343$2098$1162 RED MAX 4-CYCLE FUEL Eliminates datonation ft kickback 4-cycie engines smoother idie ft mon power 10-4CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1156 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1155 $1056 $950 RED MAX PERFORMANCE FUELI High flash point heavy oil use tuned pipes ducted fan ft other heavy dty app RED MAX FUEL Continued page 156 5 Performance$1200$900$876$804$720 10 Performance $1391$1043$1016$932$835 15 Performance 51583 $1187 $1155 $1060 $950 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps snd tunsci pipes 5Panern$1195$ 895 $ 870 $ 795 $695 10 Panern$1375$1035 $1009 $ 925 $825 iSPanern$1575 $1175 $1145 $1050 $940 SUPER TIGER 3000 FUEL Best fuel Super Tiger 2900-4000 engines ......SuperTiger3000 $1288 $965 $939 $862 $772$256 nitro week next year Red Maxs secret gredients keep engine last ing longer $225 ________ $299 _________ $375 ________ Grand Total RED MAX DIESEL FUEL Superior diesei back iist popuier demand customers Bail Bearings $1767 $1326 $1290 $1184 $1050 DieeelPfakr6eeriigs$1867 $1426 $1390 $1284 $11 50 SMOKER FLUID beet smoker fiuid 2 end 4 cycie engines Smoker Fiuld$1256 $965 $939 $862 $772$266 CUSTOM BLENDED FUEL INC RDIENTS Avatiabie type engine use Caii price Mm gaiion boats-cars-heIicoptersspeed-pstternscaie-A scaie-kavan-gnition-st3000 PLEASE PRINT CiTY STATE ZiP CARD TYPE AND NC EXPIRATION DATE GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 14, 16, 18, 20, 22, 156
line Powered mod els pets dont mix Fuel containers metal plastic best Engine back fire fires LONG agoin January l980 issue magazinemy first safety column appeared So finish column Safety Comes First will have finished its first decade print short math skills thats 120 dividual columns Bill Winter editor Model Aviation time asked Id willing author safety column first reaction Id give best shot doubted could come up enough safety-related topics make beyond year Fortunately read ers column have responded let ters some clubs supply newslet ters Both readers clubs have provided invaluable source material column based quote popular com mercial wine cooler beverage thank support whether can complete second decade remains seen Dogs No Im referring ratty models frequently see club flying field concerns four-legged variety opinion should seen frolicking around flying fieldbut may also risk injury modeling activities home July 1989 issue Tiger Rag newsletter Coeur dAlene Aeromodelers Society CAMS sent its editor think Bill Wood Bill suggested might inter ested article issue titled Pooch Safety read follows constantly reminded about need safety precautions protect property other fliers spectators No article mentions pets Heres couple contributions news letter should make consider safety pre cautions have pets first starts off engine test stand mounted sawhorse running 05 48 Master Airscrew 12 x 5 prop full throttle sitting another sawhorse set parallel test stand head down adjusted mixture control glanced up saw little dog walking straight toward nose no eight inches prop obviously couldnt see reached over test stand pulled whole rig over toward process sawhorse sitting tipped over backwards prop hit knee giving three deep gouges got wounded exercise dog walked full-throttle prop would have killed second tells tale club swap meet bought pack #11 X-Acto blades Ken Crites fire sale box watersoaked some blades rusted got home sorted out blades threw rusty ones garbage next morning breakfast table wife said Whats ledi black Lab pup chewing thats making carpet red got down knees checked pups mouth found three #11 X-Acto blades mouth chopped up have ever owned black Lab pup will know chew up swallow anything doesnt fight back So off vet gofast Seventy-eight bucks later find X-rays show no X-Acto blades innards Obviously very careless disposal blades got shop picked up off floor Moral Protect pet harm know less about what ing look Out Staying subject canine safety its September 1989 issue another model airplane publication contained several photoraphs dog chasing low-flying about two-foot altitude model photos dog appeared just about chomp down fuselage model across picture cap tion RCFun whole family Maybe fun both flier dog since dog lucky didnt get hit prop according accompanying text dur ing low pass dog slammed model ground both dog model survived latter requiring some repairs Ill leave up guess feel about type ac tivity insist taking dog fly ing field suggest keep leash Electric fuel pumps September 1989 col umn asked readers opinions whether safe use electric fuel pump dispense gas oline model expected see lot letters subject two readers sent opinions diametrically op posed reason brought up issue first place stems phone call Bill Cann member NVRC longtime friend wanted know received letters con cerning possible hazard using electric fuel pumps dispense gasoline recently took look Bills setup conContinued page 16 14 Model Aviation Use electric fuel pumps gaso fr BA ENOLAcW ThAT YCLL R1N ThE tOCr DOES 4E 1441/E Tt E CJTCTOA Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose STITS PLAYBOY 113 SCALE 88 40-50 2 cycle 4 channel 455-5 lbs Balsa Foam & Balsa Balsa Reg Price $9695 valid other offer coupon SPECIFICATIONS Engine size Radio Weight Fuselage Wing Tail Section Cowl Epoxy Glass e molded Balsa & necessary hardware included Over two years design development have gone 050 Weasel YOU mind detailed easy understand instruction make Weasel quick build fun fly Advanced Sport Fattern flyers will appreciate excellent flying characteristics ability customize airframe suit eye need Weasel can pour power tear up sky pull back cruise afternoon away Designed & Engineered RC DESIGNS 75 Price Drive Wilmington Ohio 45177 5133822158 Hrs 4-a pm Mon-Fri Terms US ocrency vviy ucceel MusterCard & Vise 00s $300 PP $400 $350 Havdhvt Ohix resideets add 5% seles tac 12-6 pm Saturdays sists automobile fuel pump mounted top one-gallon metal fuel can pump body inside can Electric power supplied pump via wires about four feet long permanently attached pump terminals Banana plugs other end wires con nect pump power panel Bills field box seemed like pretty safe arrangement However recent letter John Brassner ap pears have different opinion John La Mesa CA concerned spark pumps on/off switch could ig nite gasoline vapors letter stated RCers use power panel control electric fuel pumps opinion would safe practice gasoline least two reasons First power panel fuel container usually mounted flight box either right next other within few inches other Clearly spark power panels pump switch could easily ignite gasoline vapors adjacent gas can Second some other switching device used does seem likely would located safe distance gas can aircraft being fueled conclusion does seem automo bile fuel pump itself would safe fueling model aircraft danger vapor ignition arcing on/off switch very high John also pointed out same hazard could presented electric starter other electrical device operated vicin ity gasoline cannot disagree Johhs opin ion unsealed switch motor located close proximity can containing gasoline Con yinued page 18 old timer perfectly proportioned modeling Curtiss Robin 049 Engines -channel RIC 41 Wingspan Electric Power Optional $2295 Oi em3 very law tell scale aimratt ideally sailed medal night aa appealing old cartisa ReSin spruce ana linen age beaetitully pwpertioned rubber electric er glow engines Easy end Ian build trainer-like performance Flyllee Medals Catalog 50Photo 703 273wta INE MODELS INC RO Boa 2136 Fairfax VirgInIa 22031 USA - HOBBY SHOP JET bust completely finished authentically detailed poseable 1/8 scale Ifl QOenierpr~se2051 224-4170 Wp o box 5631tresno cx 93755 16 Model Aviation MUNUUUUIL UA 114 SCALE 96 WACO UPF-7 1/5 SCALE 72 HOLIDAY $8495 SPECIAL BALSA SHEETS 36 48 30 16233 332240 18243 318249 14 258 132337 1 20337 1 1633749 31 33234458 37 18 35471 45 31636282 55 14 37395 81 518385110 38388124 71 12 3110155 34 3165191 1 1645878 48 33247094 58 1848010688 916493122 75 144110134 84 984165225139 12 4225281 MATCHED SHUTS 42 3324100 154108 3184120 144131 BALSA STICKS 3645 1161409 1163810 1161214 3321410 332 3812 3321216 181005 18141118 18381218 18121024 3163161118 316 351720 316 122230 14141624 14 381926 4122130 14343444 14 14055 5165162128 38 382737 38123246 36 344255 38 15270 12123653 12344662 12 15878 58 584885 34 346790 V BALSA TRIANGL ES 36 29 8830 35 45 55 BALSA PLANKS36 58 00 1480 1123275 1124360 22225 23325 24435 33495 34688 TAPERED SHEETS 36 14265 14385 38268 38398 123120 LONE STAR EPOXY 9 oL51895 Sw,598 16,,598 30n,r598 U 3] 11 ~ IZ1AA ~OEU CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 4-6 LB WOOD36 1323 53 120353 1163 53 332363 18377 316389 i43104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 384236 124322 TRAILING EDGE 36 14132 51611439 3611246 12270 INSTANT GLUE 1o 75ck 298 1 v Oh, 298 2vi TOcI 550 2v 11, 580 must try 4-6 lb balsa * NEW * Hundreds rt8W sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 3648 18 181725 18 142026 18 382232 3163162838 14 143450 14 3184055 14 124585 38 3S4989 38128077 12126888 12347597 SPRUCE TRIANGLES 38 38 1212 3434 LflI Pt Y48 18x6 18 x 12 14x6 14 x 12 BASSWOOD48 31631626 3161430 3163838 3161246 3163460 141442 143843 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 20-116336698 201 16436 1035 20332336 865 15332436 955 1618336 735 1518436 695 15316336 928 10316436 835 101 4336655 1014436 930 103/8336870 5384 36 655 512336 540 5124361080 10332 446 885 51/8448500 5316 448680 514448 845 _________ I HARD MAPLE 1438 3835 3812 3834 1234 BIRCH DOWELS 18 316 516 38 16 40 45 50 58 68 36 09 14 26 32 PLY8IRCU 48 184x12835 132x12475 118x12475 18x12495 5 PLYUIRCH 48 332x12700 18n12775 36316x12625 4714x12625 6438x12725 8112x12900 GROOVED LG MOUNTS 12 MehS 383418/40 38341532140 2 16146 175 350 275 550 LONE STAR MODELS Cant Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO 1623 57th St Lubbock IX 79412 Stntm Weaccept Visa Mastercard personal cheeks coo 614% tax Texas US currency Minimum Wood Order $1000 Tgi hobby pe am Kits P& W ModelService 1938 MisS America 84$7196 1936 Buccaneer 84 $8998 1937 Dallaire 108$7516 1838 Clipper Mk 72 $4156 1838 lOud King 63$4236 1938 PowerhouSe 84 $5386 1939 Record Breaker 96$6956 1939 Trenton Terror 7254076 1839 Korda Wake 44$1916 1939 Mercury 72 $5836 1939 Zipper 54$8356 1940 Ranger 46 $3798 1940 Sailplane 78 58476 1940 So Long 50 $3036 1841 Brigidier 56 $4076 1841 Super Quaker 78 $7276 1941 PlayboyJr54 $3116 1841 PlayboySr80 $5116 1941 Brooklyn 0040Cr56 $4236 Midway Model Co Full Kits 1936 Flying Osaker 84$64761938 PowerhouSe 50 $2996 1937 Long Cabin 78$47181939 T Spodner 50 $2996 1937 Quaker Flash 67$45561948 Buzzard Bombnhell l937AirChiet6l$3596 2opelkh $5896 l94ONewRaler74$7116 0tpankk 3096 Thc ubove kits qualify Sam events PP & R/C feature highest quality machine cut & sanded parts sheet & snip wood wire & window material Most plans original PP models easily convertible Sch R/C SaIplanes Electric Power Gas Kits MIDWAY MODEL COELECTRIC MODEL DESIGN Gnome 1-ILO 60$2400Sky Knight 44 05 DI$2400 Gnome2M Gsder79$3796ElectraGlde II 73 05D$3100 Fast Edde 05 D $2480 Lightning 36 09 0 $2400 UtmMkiV 10661 $3796 TttermcTruneller OSOorO $3100 Electric Playboy 05 GI $2600 Hobby Horn Senanar Girder 78 lot 05 electric $1800 Astro ChulleIrger 05 Geared $3250 Astro Viking 85 Geared $3250 Astre Portedield 1150120 Geared $5998 Astro SpaS 37 05 Direct $2996 Daneyn Robin 05 Geared $3371 Daveys Le Crate 05 Gearetll $3596 FULL LINE OF ELECTRIC SYSTEMS & PARTS AVAIL SHIPPINO & I4ANOLINO76 Page CATALOGUE Upto $800 4014 5200$206 pp/lot Class free $801 $2000 add $250when requested order $2001 $4500 add $325 $4501 $7000 add $375HOBBY HORN Ooer $7006 add $450 CA Addressees add 8% tao Send 3 MOran St [A MO VISA / MC 8 5 Eop Check llox 2212 allOw up 1030 days br checkWestminster Ca 92684 clearuoce 993-8311 COD t charges pius $150Hra Mon-Fri 9AM 5PM handling CasS Only possibility spark Could ignite gas oline vapor However opposite opinion expressed letter JD Tison Bradley IL JD son involved automobile drag rac ing over 15 years have auto parts speed equipment company called Engine Mas ters JD has also modeling 56 years prize possession currently scratchbuilt 104-in-span PT-19 sketch flight box accompanied let ter shows electric fuel pump Honda mounted end box power panel other gasoline can mounted flight box stands ground remote box fuel can to-pump pump-to-model flows through automotive vacuum hoses JD reports no prob lems arrangement seems can safely use elec tric pump dispense gasoline model keep fuel can model being fueled well away sources electrical arcs However dont want redesign flight box suggest take look new Du-Bro Model F/P 491 handoperated plunger-type fuel pump mounts neatly cap either plastic metal fuel can Only plunger fuel outlet ex posed According Du-Bro stroke pump will dispense ounce fuel pump claimed work well either glow diesel gasoline fuels Fuel containers Continuing subject fueling systems lets turn electric pumps containers Which type container safer metal plastic question posed September column Ellis McGaughy Con finued page 20 18 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE CoIl 18061745 6394 lOam 6pmCeatralTime rWARBIRDS rate home ofliceor shop ouroutstnsdisg Warbird plaques 39 styles choose trom 6406 actually 3-view drawing has screened 004 metal plate placed 9 X 12 plaque cut key hole slot mount Ilash wall Only $1490 na tour br $4995 delivered via UPS prepaid Available gold silver Please specily color plane names Order direct Send check money order Visa/Mastercard namber enpiraSon date No hassle money back guarantee P-380 AircobraP51-u ikbuurangFJ-4 Fury 8-1000 FlyingF9F-S CougarF-OA 86 Freedom FortressHawker Fighter B-28A Super HurricaneF-840 Thundvrjet FortreanHawkerF- 1050 Thunder P400 Warhawk Sea Fury Chief 582C-3 HelldiverJunkers StukaF-470 Thunderbolt Mosquito B4F86F-lo4JStarhghterSikorsky Sea Sat C-t24CP-38J LightningSpitfire GlohemasterP-SOB ShootingF4U-tO Corsair Oouglas OC-3 StarF-BE Crusader F40-t SkyrayA-tJSkyraderFokkerl3-VII DouglasSkyhawk IISopwith Camel DauntleasldeuaeruchmirrSPAD 13C Focke Wull tgt2GMig 25 FoxhatNewport 17 C-I F6F-3 HellcatF-880 SabreF9F-2 Searcat also have award plaques available tsr R/C F/F C/ br contesla Write br tree brochure Prices start $795 includes engraving shipping costa achve modelers will treat rightl Jim & Mary Jennings AMA 891 396 JENNINGS PRODUCTS DEPT MA-i OX 1121 HENDERSONVILLE TN 37977-1121 16151 824-0475 HOT STUFF Leading way 20 years last C C 0 0 0 0 5 O 00 CO 0 0 Pilot wwI Civ/Spoi WWII 1995 Add $3ir item Califorriiots add 8aI8 M9@ enterpriseS po box 5631fresno calif93755 209 2244170 ______________ u11 Figure 1/6 scale $2995 2995 3750 responded Ellis chemical engineer employed Charleston WV chemical com pany has modeling some 15 years following say Up front let say have come conclusion metal safer though plas tic has its virtues 'Methanol well gasoline must treated respect Methanol has two key char acteristics remember good other bad Methanol electrically conductive fore cannot build hold static charge could provide source ignition property holds true liquid has nothing container liquid stored container electrically nonconduc tive can cause spark due static electricity bad property methanol related fuel/air mixture generated room temperature worst possible explosions occur flammable vapor present stoichiometric pro portions oxygen simply means exact amount air required burn fuel present too lean too rich vapor pressure methanol such very nearly creates proper mixture room temperature Therefore extremely explosive mixture exists fuel containers controllable factor prevents explosion absence ignition source Industry typi cally uses nitrogen inerting extensive equip ment grounding ensure explosion doesnt occur trogen inerting practical purposes work safety standards allow stor age flammable materials plastic containers larger gallon restriction because Continued page 22 20 Model Aviation RADIO CONTROL SNORT KIT AMERICAN P40 Tomahawk TO 45 ENGINES WING SPAN 55 FLIES LIKE DREAM WITH PLENTY OF WING AND TAIL AREA FOR FULL-RANGE POSITIVE CONTROL DESIGNED WITH FOAM WING AND BOX FRAME FUSELAGE FOR SIMPLE AND STURDY CONSTRUCTION WE FURNISH THE ESSENTIAL PARTS ALONG WITH EASY-TO-FOLLOW PLANS AND LET THE BUILDER SELECT HIS OWN WOOD AND ADDITIONAL HARDWARE SNORT KIT INCLUDES PRECISION CUT ARCOFOAM WING CORES ABS HIGH-IMPACT COWLING FORMED WING GUN PORTS AND EXHAUST CRYSTAL CLEAR CANOPY WITH FRAMEWORK PLYWOOD FIREWALL LANDING GEAR STRAPS BLOCKS AND SCREWS FORMED STEEL ENGINE MOUNT CONTROL SURFACE HINGES CLEAR PLANS WITH CONSTRUCTION DETAILS AND ALL NECESSARY TEMPLATES BILL OF MATERIALS NO BALSA INCLUDED ORDERING StND CHECI OR MONEY ORDER FOP S3750 PLUS 450 POSTAGE CANADIANS ADD 650 TO WING Mfg 306 E Simmons Galesburg IL 61401 IL RtS ADD 6% SALES TAX ALL ORDERS MUST St IN US FUNDS StND 400 FOR PRODUCT CATALOG DESCRIBING OUR COMPLtTt LINE OP FOAM CORt REPLACEMtNT WINGS ACCESSORIES KITS TOOLS AND MUCH MORE 309-342-3009 Satellite ityPO BOX 836 SIMI VALLEY CALIFORNIA 93062PHONE 805 522-0062 plastic nonconductive can therefore cause static electrical discharge addition metal con tainers larger gallon should grounded prior filling emptying Most people realize importance grounding because absence visible grounding wire till ing ones automobile gasoline Actually grounding wire inside gasoline hose prevents possibility arcing electrical insulating property plastic al lows static develop also reduces prob ability accidentally shorting out batteries feel field box properly designed ie batteries located away fuel container wiring good condition hazard small have installed kill switch near 12-volt battery tripped off whenever field box use switch mounted location such cannot accidentally bumped would very difficult young child operate does safe guard help prevent fuel fires also prevents accidents related various electrical com ponents use Since us keep fuel containers hav ing capacities gallon less static dis charge may primary consideration making decision whether use metal can plastic bottle However other considerations localized hot spot like mis placed soldering iron cigarette will quickly cause failure plastic bottle plastic con tainer contact retaining strap other sharp object likely fail metal can used summary prefer metal fuel containers due durability inability create static charges Ideally container should safety can listed Underwriters Laboratories Inc approved Factory Mutual Engineering Corpo ration cans utilize spring-loaded lid de signed relieve internal pressure safely subjected fire exposure type safety container used feel advantages metal outweigh explosion hazard due fire exposure Metal containers help prevent fire starting first place Since Ellis seems have covered metalversus-plastic issue some depth dont believe necessary add further com ments Engine backfire fire Jessie Aronstein Pough keepsie NY sent page Flight-Line newsletter Mid-Hudson RC Club editor Donald Roy contained report incident experienced Mike Tebolt has happened daresay other readersthe backfire fire Read trying get 049 engine started Sailplane primer fuel run down power pod over plane en gine sputtered backfired spilled fuel caught fire Now dont know al cohol fire tough see dont know what part plane hold marshmallow over get properly cooked Mike able see parts plane burning because MonoKote tight ened up nicely too much developed holes increasing size Although no fire extinguishers field lostthere enough members field full hot air managed put out flames no structural damage Mike 22 Model Aviation Power easy starting power Smooth take offs power intricate maneuvers Red Max makes engine came alive power performance never expected can have power Its phone call away Power today next running power fully other _____ 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics _____ other fuel $231 ________ $309 ___ $388 _________ Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL iN QTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free qts gals No hand ling charge Freight collect drums Deduct 3% prepay Mix qty Total ty deter mines price sC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD ICOD add $2 per cartonl Personal checks may held until cleared OTYFUELiGAL 4GAL24GAL6OGAL12BGaI 154 GAL 1TOTAL$ ordered MIXTUREID RUMAMT RED MAX PREMIUM FUELI fuel beginners ft sport fiyere should use Avali synthetic castor blend RED MAX 0 RED MAX 5 RED MAX 10 RED MAX 12 RED MAX 15 $999$749$729$889$599$150 $1152$884$841$772$691$212 $1288$955$939$862$772$256 $1372$1029$1002$919$823$301 $1458$1094$1065$977$875$336 RED MAXRACINGFUEL Trophy winner planes boats ft cars two boat biends castor ok up 40 REDMAX2O$1775$1332$1296$1190$1065$464 RED MAX 26$1956$1474$1435$1317$1179$541 RED MAX 40$2539$1905$1854$1701$1524$774 REDMAX50$2922$2192$2133$1956$1753$929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 5653497$2622$2552$2343$2098$1162 RED MAX 4-CYCLE FUEL Eliminates datonation ft kickback 4-cycie engines smoother idie ft mon power 10-4CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1156 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1155 $1056 $950 RED MAX PERFORMANCE FUELI High flash point heavy oil use tuned pipes ducted fan ft other heavy dty app RED MAX FUEL Continued page 156 5 Performance$1200$900$876$804$720 10 Performance $1391$1043$1016$932$835 15 Performance 51583 $1187 $1155 $1060 $950 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps snd tunsci pipes 5Panern$1195$ 895 $ 870 $ 795 $695 10 Panern$1375$1035 $1009 $ 925 $825 iSPanern$1575 $1175 $1145 $1050 $940 SUPER TIGER 3000 FUEL Best fuel Super Tiger 2900-4000 engines ......SuperTiger3000 $1288 $965 $939 $862 $772$256 nitro week next year Red Maxs secret gredients keep engine last ing longer $225 ________ $299 _________ $375 ________ Grand Total RED MAX DIESEL FUEL Superior diesei back iist popuier demand customers Bail Bearings $1767 $1326 $1290 $1184 $1050 DieeelPfakr6eeriigs$1867 $1426 $1390 $1284 $11 50 SMOKER FLUID beet smoker fiuid 2 end 4 cycie engines Smoker Fiuld$1256 $965 $939 $862 $772$266 CUSTOM BLENDED FUEL INC RDIENTS Avatiabie type engine use Caii price Mm gaiion boats-cars-heIicoptersspeed-pstternscaie-A scaie-kavan-gnition-st3000 PLEASE PRINT CiTY STATE ZiP CARD TYPE AND NC EXPIRATION DATE GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 14, 16, 18, 20, 22, 156
line Powered mod els pets dont mix Fuel containers metal plastic best Engine back fire fires LONG agoin January l980 issue magazinemy first safety column appeared So finish column Safety Comes First will have finished its first decade print short math skills thats 120 dividual columns Bill Winter editor Model Aviation time asked Id willing author safety column first reaction Id give best shot doubted could come up enough safety-related topics make beyond year Fortunately read ers column have responded let ters some clubs supply newslet ters Both readers clubs have provided invaluable source material column based quote popular com mercial wine cooler beverage thank support whether can complete second decade remains seen Dogs No Im referring ratty models frequently see club flying field concerns four-legged variety opinion should seen frolicking around flying fieldbut may also risk injury modeling activities home July 1989 issue Tiger Rag newsletter Coeur dAlene Aeromodelers Society CAMS sent its editor think Bill Wood Bill suggested might inter ested article issue titled Pooch Safety read follows constantly reminded about need safety precautions protect property other fliers spectators No article mentions pets Heres couple contributions news letter should make consider safety pre cautions have pets first starts off engine test stand mounted sawhorse running 05 48 Master Airscrew 12 x 5 prop full throttle sitting another sawhorse set parallel test stand head down adjusted mixture control glanced up saw little dog walking straight toward nose no eight inches prop obviously couldnt see reached over test stand pulled whole rig over toward process sawhorse sitting tipped over backwards prop hit knee giving three deep gouges got wounded exercise dog walked full-throttle prop would have killed second tells tale club swap meet bought pack #11 X-Acto blades Ken Crites fire sale box watersoaked some blades rusted got home sorted out blades threw rusty ones garbage next morning breakfast table wife said Whats ledi black Lab pup chewing thats making carpet red got down knees checked pups mouth found three #11 X-Acto blades mouth chopped up have ever owned black Lab pup will know chew up swallow anything doesnt fight back So off vet gofast Seventy-eight bucks later find X-rays show no X-Acto blades innards Obviously very careless disposal blades got shop picked up off floor Moral Protect pet harm know less about what ing look Out Staying subject canine safety its September 1989 issue another model airplane publication contained several photoraphs dog chasing low-flying about two-foot altitude model photos dog appeared just about chomp down fuselage model across picture cap tion RCFun whole family Maybe fun both flier dog since dog lucky didnt get hit prop according accompanying text dur ing low pass dog slammed model ground both dog model survived latter requiring some repairs Ill leave up guess feel about type ac tivity insist taking dog fly ing field suggest keep leash Electric fuel pumps September 1989 col umn asked readers opinions whether safe use electric fuel pump dispense gas oline model expected see lot letters subject two readers sent opinions diametrically op posed reason brought up issue first place stems phone call Bill Cann member NVRC longtime friend wanted know received letters con cerning possible hazard using electric fuel pumps dispense gasoline recently took look Bills setup conContinued page 16 14 Model Aviation Use electric fuel pumps gaso fr BA ENOLAcW ThAT YCLL R1N ThE tOCr DOES 4E 1441/E Tt E CJTCTOA Celebrating 10 years producing largest selection giant scale kits available today Design building integrity scale fidelity scale flight characteristics standard IKON NWST 22 kits choose STITS PLAYBOY 113 SCALE 88 40-50 2 cycle 4 channel 455-5 lbs Balsa Foam & Balsa Balsa Reg Price $9695 valid other offer coupon SPECIFICATIONS Engine size Radio Weight Fuselage Wing Tail Section Cowl Epoxy Glass e molded Balsa & necessary hardware included Over two years design development have gone 050 Weasel YOU mind detailed easy understand instruction make Weasel quick build fun fly Advanced Sport Fattern flyers will appreciate excellent flying characteristics ability customize airframe suit eye need Weasel can pour power tear up sky pull back cruise afternoon away Designed & Engineered RC DESIGNS 75 Price Drive Wilmington Ohio 45177 5133822158 Hrs 4-a pm Mon-Fri Terms US ocrency vviy ucceel MusterCard & Vise 00s $300 PP $400 $350 Havdhvt Ohix resideets add 5% seles tac 12-6 pm Saturdays sists automobile fuel pump mounted top one-gallon metal fuel can pump body inside can Electric power supplied pump via wires about four feet long permanently attached pump terminals Banana plugs other end wires con nect pump power panel Bills field box seemed like pretty safe arrangement However recent letter John Brassner ap pears have different opinion John La Mesa CA concerned spark pumps on/off switch could ig nite gasoline vapors letter stated RCers use power panel control electric fuel pumps opinion would safe practice gasoline least two reasons First power panel fuel container usually mounted flight box either right next other within few inches other Clearly spark power panels pump switch could easily ignite gasoline vapors adjacent gas can Second some other switching device used does seem likely would located safe distance gas can aircraft being fueled conclusion does seem automo bile fuel pump itself would safe fueling model aircraft danger vapor ignition arcing on/off switch very high John also pointed out same hazard could presented electric starter other electrical device operated vicin ity gasoline cannot disagree Johhs opin ion unsealed switch motor located close proximity can containing gasoline Con yinued page 18 old timer perfectly proportioned modeling Curtiss Robin 049 Engines -channel RIC 41 Wingspan Electric Power Optional $2295 Oi em3 very law tell scale aimratt ideally sailed medal night aa appealing old cartisa ReSin spruce ana linen age beaetitully pwpertioned rubber electric er glow engines Easy end Ian build trainer-like performance Flyllee Medals Catalog 50Photo 703 273wta INE MODELS INC RO Boa 2136 Fairfax VirgInIa 22031 USA - HOBBY SHOP JET bust completely finished authentically detailed poseable 1/8 scale Ifl QOenierpr~se2051 224-4170 Wp o box 5631tresno cx 93755 16 Model Aviation MUNUUUUIL UA 114 SCALE 96 WACO UPF-7 1/5 SCALE 72 HOLIDAY $8495 SPECIAL BALSA SHEETS 36 48 30 16233 332240 18243 318249 14 258 132337 1 20337 1 1633749 31 33234458 37 18 35471 45 31636282 55 14 37395 81 518385110 38388124 71 12 3110155 34 3165191 1 1645878 48 33247094 58 1848010688 916493122 75 144110134 84 984165225139 12 4225281 MATCHED SHUTS 42 3324100 154108 3184120 144131 BALSA STICKS 3645 1161409 1163810 1161214 3321410 332 3812 3321216 181005 18141118 18381218 18121024 3163161118 316 351720 316 122230 14141624 14 381926 4122130 14343444 14 14055 5165162128 38 382737 38123246 36 344255 38 15270 12123653 12344662 12 15878 58 584885 34 346790 V BALSA TRIANGL ES 36 29 8830 35 45 55 BALSA PLANKS36 58 00 1480 1123275 1124360 22225 23325 24435 33495 34688 TAPERED SHEETS 36 14265 14385 38268 38398 123120 LONE STAR EPOXY 9 oL51895 Sw,598 16,,598 30n,r598 U 3] 11 ~ IZ1AA ~OEU CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance LIGHT 4-6 LB WOOD36 1323 53 120353 1163 53 332363 18377 316389 i43104 383122 123158 343242 1 3335 116483 3324100 184115 3164133 144158 384236 124322 TRAILING EDGE 36 14132 51611439 3611246 12270 INSTANT GLUE 1o 75ck 298 1 v Oh, 298 2vi TOcI 550 2v 11, 580 must try 4-6 lb balsa * NEW * Hundreds rt8W sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 3648 18 181725 18 142026 18 382232 3163162838 14 143450 14 3184055 14 124585 38 3S4989 38128077 12126888 12347597 SPRUCE TRIANGLES 38 38 1212 3434 LflI Pt Y48 18x6 18 x 12 14x6 14 x 12 BASSWOOD48 31631626 3161430 3163838 3161246 3163460 141442 143843 143480 383860 381270 383490 121290 1234100 BUNDLE DEALS 20-116336698 201 16436 1035 20332336 865 15332436 955 1618336 735 1518436 695 15316336 928 10316436 835 101 4336655 1014436 930 103/8336870 5384 36 655 512336 540 5124361080 10332 446 885 51/8448500 5316 448680 514448 845 _________ I HARD MAPLE 1438 3835 3812 3834 1234 BIRCH DOWELS 18 316 516 38 16 40 45 50 58 68 36 09 14 26 32 PLY8IRCU 48 184x12835 132x12475 118x12475 18x12495 5 PLYUIRCH 48 332x12700 18n12775 36316x12625 4714x12625 6438x12725 8112x12900 GROOVED LG MOUNTS 12 MehS 383418/40 38341532140 2 16146 175 350 275 550 LONE STAR MODELS Cant Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO 1623 57th St Lubbock IX 79412 Stntm Weaccept Visa Mastercard personal cheeks coo 614% tax Texas US currency Minimum Wood Order $1000 Tgi hobby pe am Kits P& W ModelService 1938 MisS America 84$7196 1936 Buccaneer 84 $8998 1937 Dallaire 108$7516 1838 Clipper Mk 72 $4156 1838 lOud King 63$4236 1938 PowerhouSe 84 $5386 1939 Record Breaker 96$6956 1939 Trenton Terror 7254076 1839 Korda Wake 44$1916 1939 Mercury 72 $5836 1939 Zipper 54$8356 1940 Ranger 46 $3798 1940 Sailplane 78 58476 1940 So Long 50 $3036 1841 Brigidier 56 $4076 1841 Super Quaker 78 $7276 1941 PlayboyJr54 $3116 1841 PlayboySr80 $5116 1941 Brooklyn 0040Cr56 $4236 Midway Model Co Full Kits 1936 Flying Osaker 84$64761938 PowerhouSe 50 $2996 1937 Long Cabin 78$47181939 T Spodner 50 $2996 1937 Quaker Flash 67$45561948 Buzzard Bombnhell l937AirChiet6l$3596 2opelkh $5896 l94ONewRaler74$7116 0tpankk 3096 Thc ubove kits qualify Sam events PP & R/C feature highest quality machine cut & sanded parts sheet & snip wood wire & window material Most plans original PP models easily convertible Sch R/C SaIplanes Electric Power Gas Kits MIDWAY MODEL COELECTRIC MODEL DESIGN Gnome 1-ILO 60$2400Sky Knight 44 05 DI$2400 Gnome2M Gsder79$3796ElectraGlde II 73 05D$3100 Fast Edde 05 D $2480 Lightning 36 09 0 $2400 UtmMkiV 10661 $3796 TttermcTruneller OSOorO $3100 Electric Playboy 05 GI $2600 Hobby Horn Senanar Girder 78 lot 05 electric $1800 Astro ChulleIrger 05 Geared $3250 Astro Viking 85 Geared $3250 Astre Portedield 1150120 Geared $5998 Astro SpaS 37 05 Direct $2996 Daneyn Robin 05 Geared $3371 Daveys Le Crate 05 Gearetll $3596 FULL LINE OF ELECTRIC SYSTEMS & PARTS AVAIL SHIPPINO & I4ANOLINO76 Page CATALOGUE Upto $800 4014 5200$206 pp/lot Class free $801 $2000 add $250when requested order $2001 $4500 add $325 $4501 $7000 add $375HOBBY HORN Ooer $7006 add $450 CA Addressees add 8% tao Send 3 MOran St [A MO VISA / MC 8 5 Eop Check llox 2212 allOw up 1030 days br checkWestminster Ca 92684 clearuoce 993-8311 COD t charges pius $150Hra Mon-Fri 9AM 5PM handling CasS Only possibility spark Could ignite gas oline vapor However opposite opinion expressed letter JD Tison Bradley IL JD son involved automobile drag rac ing over 15 years have auto parts speed equipment company called Engine Mas ters JD has also modeling 56 years prize possession currently scratchbuilt 104-in-span PT-19 sketch flight box accompanied let ter shows electric fuel pump Honda mounted end box power panel other gasoline can mounted flight box stands ground remote box fuel can to-pump pump-to-model flows through automotive vacuum hoses JD reports no prob lems arrangement seems can safely use elec tric pump dispense gasoline model keep fuel can model being fueled well away sources electrical arcs However dont want redesign flight box suggest take look new Du-Bro Model F/P 491 handoperated plunger-type fuel pump mounts neatly cap either plastic metal fuel can Only plunger fuel outlet ex posed According Du-Bro stroke pump will dispense ounce fuel pump claimed work well either glow diesel gasoline fuels Fuel containers Continuing subject fueling systems lets turn electric pumps containers Which type container safer metal plastic question posed September column Ellis McGaughy Con finued page 20 18 Model Aviation WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA HOT LINE CoIl 18061745 6394 lOam 6pmCeatralTime rWARBIRDS rate home ofliceor shop ouroutstnsdisg Warbird plaques 39 styles choose trom 6406 actually 3-view drawing has screened 004 metal plate placed 9 X 12 plaque cut key hole slot mount Ilash wall Only $1490 na tour br $4995 delivered via UPS prepaid Available gold silver Please specily color plane names Order direct Send check money order Visa/Mastercard namber enpiraSon date No hassle money back guarantee P-380 AircobraP51-u ikbuurangFJ-4 Fury 8-1000 FlyingF9F-S CougarF-OA 86 Freedom FortressHawker Fighter B-28A Super HurricaneF-840 Thundvrjet FortreanHawkerF- 1050 Thunder P400 Warhawk Sea Fury Chief 582C-3 HelldiverJunkers StukaF-470 Thunderbolt Mosquito B4F86F-lo4JStarhghterSikorsky Sea Sat C-t24CP-38J LightningSpitfire GlohemasterP-SOB ShootingF4U-tO Corsair Oouglas OC-3 StarF-BE Crusader F40-t SkyrayA-tJSkyraderFokkerl3-VII DouglasSkyhawk IISopwith Camel DauntleasldeuaeruchmirrSPAD 13C Focke Wull tgt2GMig 25 FoxhatNewport 17 C-I F6F-3 HellcatF-880 SabreF9F-2 Searcat also have award plaques available tsr R/C F/F C/ br contesla Write br tree brochure Prices start $795 includes engraving shipping costa achve modelers will treat rightl Jim & Mary Jennings AMA 891 396 JENNINGS PRODUCTS DEPT MA-i OX 1121 HENDERSONVILLE TN 37977-1121 16151 824-0475 HOT STUFF Leading way 20 years last C C 0 0 0 0 5 O 00 CO 0 0 Pilot wwI Civ/Spoi WWII 1995 Add $3ir item Califorriiots add 8aI8 M9@ enterpriseS po box 5631fresno calif93755 209 2244170 ______________ u11 Figure 1/6 scale $2995 2995 3750 responded Ellis chemical engineer employed Charleston WV chemical com pany has modeling some 15 years following say Up front let say have come conclusion metal safer though plas tic has its virtues 'Methanol well gasoline must treated respect Methanol has two key char acteristics remember good other bad Methanol electrically conductive fore cannot build hold static charge could provide source ignition property holds true liquid has nothing container liquid stored container electrically nonconduc tive can cause spark due static electricity bad property methanol related fuel/air mixture generated room temperature worst possible explosions occur flammable vapor present stoichiometric pro portions oxygen simply means exact amount air required burn fuel present too lean too rich vapor pressure methanol such very nearly creates proper mixture room temperature Therefore extremely explosive mixture exists fuel containers controllable factor prevents explosion absence ignition source Industry typi cally uses nitrogen inerting extensive equip ment grounding ensure explosion doesnt occur trogen inerting practical purposes work safety standards allow stor age flammable materials plastic containers larger gallon restriction because Continued page 22 20 Model Aviation RADIO CONTROL SNORT KIT AMERICAN P40 Tomahawk TO 45 ENGINES WING SPAN 55 FLIES LIKE DREAM WITH PLENTY OF WING AND TAIL AREA FOR FULL-RANGE POSITIVE CONTROL DESIGNED WITH FOAM WING AND BOX FRAME FUSELAGE FOR SIMPLE AND STURDY CONSTRUCTION WE FURNISH THE ESSENTIAL PARTS ALONG WITH EASY-TO-FOLLOW PLANS AND LET THE BUILDER SELECT HIS OWN WOOD AND ADDITIONAL HARDWARE SNORT KIT INCLUDES PRECISION CUT ARCOFOAM WING CORES ABS HIGH-IMPACT COWLING FORMED WING GUN PORTS AND EXHAUST CRYSTAL CLEAR CANOPY WITH FRAMEWORK PLYWOOD FIREWALL LANDING GEAR STRAPS BLOCKS AND SCREWS FORMED STEEL ENGINE MOUNT CONTROL SURFACE HINGES CLEAR PLANS WITH CONSTRUCTION DETAILS AND ALL NECESSARY TEMPLATES BILL OF MATERIALS NO BALSA INCLUDED ORDERING StND CHECI OR MONEY ORDER FOP S3750 PLUS 450 POSTAGE CANADIANS ADD 650 TO WING Mfg 306 E Simmons Galesburg IL 61401 IL RtS ADD 6% SALES TAX ALL ORDERS MUST St IN US FUNDS StND 400 FOR PRODUCT CATALOG DESCRIBING OUR COMPLtTt LINE OP FOAM CORt REPLACEMtNT WINGS ACCESSORIES KITS TOOLS AND MUCH MORE 309-342-3009 Satellite ityPO BOX 836 SIMI VALLEY CALIFORNIA 93062PHONE 805 522-0062 plastic nonconductive can therefore cause static electrical discharge addition metal con tainers larger gallon should grounded prior filling emptying Most people realize importance grounding because absence visible grounding wire till ing ones automobile gasoline Actually grounding wire inside gasoline hose prevents possibility arcing electrical insulating property plastic al lows static develop also reduces prob ability accidentally shorting out batteries feel field box properly designed ie batteries located away fuel container wiring good condition hazard small have installed kill switch near 12-volt battery tripped off whenever field box use switch mounted location such cannot accidentally bumped would very difficult young child operate does safe guard help prevent fuel fires also prevents accidents related various electrical com ponents use Since us keep fuel containers hav ing capacities gallon less static dis charge may primary consideration making decision whether use metal can plastic bottle However other considerations localized hot spot like mis placed soldering iron cigarette will quickly cause failure plastic bottle plastic con tainer contact retaining strap other sharp object likely fail metal can used summary prefer metal fuel containers due durability inability create static charges Ideally container should safety can listed Underwriters Laboratories Inc approved Factory Mutual Engineering Corpo ration cans utilize spring-loaded lid de signed relieve internal pressure safely subjected fire exposure type safety container used feel advantages metal outweigh explosion hazard due fire exposure Metal containers help prevent fire starting first place Since Ellis seems have covered metalversus-plastic issue some depth dont believe necessary add further com ments Engine backfire fire Jessie Aronstein Pough keepsie NY sent page Flight-Line newsletter Mid-Hudson RC Club editor Donald Roy contained report incident experienced Mike Tebolt has happened daresay other readersthe backfire fire Read trying get 049 engine started Sailplane primer fuel run down power pod over plane en gine sputtered backfired spilled fuel caught fire Now dont know al cohol fire tough see dont know what part plane hold marshmallow over get properly cooked Mike able see parts plane burning because MonoKote tight ened up nicely too much developed holes increasing size Although no fire extinguishers field lostthere enough members field full hot air managed put out flames no structural damage Mike 22 Model Aviation Power easy starting power Smooth take offs power intricate maneuvers Red Max makes engine came alive power performance never expected can have power Its phone call away Power today next running power fully other _____ 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle better wear char acteristics _____ other fuel $231 ________ $309 ___ $388 _________ Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL iN QTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free qts gals No hand ling charge Freight collect drums Deduct 3% prepay Mix qty Total ty deter mines price sC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD ICOD add $2 per cartonl Personal checks may held until cleared OTYFUELiGAL 4GAL24GAL6OGAL12BGaI 154 GAL 1TOTAL$ ordered MIXTUREID RUMAMT RED MAX PREMIUM FUELI fuel beginners ft sport fiyere should use Avali synthetic castor blend RED MAX 0 RED MAX 5 RED MAX 10 RED MAX 12 RED MAX 15 $999$749$729$889$599$150 $1152$884$841$772$691$212 $1288$955$939$862$772$256 $1372$1029$1002$919$823$301 $1458$1094$1065$977$875$336 RED MAXRACINGFUEL Trophy winner planes boats ft cars two boat biends castor ok up 40 REDMAX2O$1775$1332$1296$1190$1065$464 RED MAX 26$1956$1474$1435$1317$1179$541 RED MAX 40$2539$1905$1854$1701$1524$774 REDMAX50$2922$2192$2133$1956$1753$929 REDMAX6O$3305$2479$2413$2214$1983$1084 RED MAX 5653497$2622$2552$2343$2098$1162 RED MAX 4-CYCLE FUEL Eliminates datonation ft kickback 4-cycie engines smoother idie ft mon power 10-4CYCLE$1363 $1022 $995 $913 $818$296 15-4CYCLE$1555 $1156 $1135 $1042 $933$375 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs 10 Helicopter$1391 $1043 $1016 $932 $835$309 15 Helicopter$1583 $1187 $1155 $1056 $950 RED MAX PERFORMANCE FUELI High flash point heavy oil use tuned pipes ducted fan ft other heavy dty app RED MAX FUEL Continued page 156 5 Performance$1200$900$876$804$720 10 Performance $1391$1043$1016$932$835 15 Performance 51583 $1187 $1155 $1060 $950 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps snd tunsci pipes 5Panern$1195$ 895 $ 870 $ 795 $695 10 Panern$1375$1035 $1009 $ 925 $825 iSPanern$1575 $1175 $1145 $1050 $940 SUPER TIGER 3000 FUEL Best fuel Super Tiger 2900-4000 engines ......SuperTiger3000 $1288 $965 $939 $862 $772$256 nitro week next year Red Maxs secret gredients keep engine last ing longer $225 ________ $299 _________ $375 ________ Grand Total RED MAX DIESEL FUEL Superior diesei back iist popuier demand customers Bail Bearings $1767 $1326 $1290 $1184 $1050 DieeelPfakr6eeriigs$1867 $1426 $1390 $1284 $11 50 SMOKER FLUID beet smoker fiuid 2 end 4 cycie engines Smoker Fiuld$1256 $965 $939 $862 $772$266 CUSTOM BLENDED FUEL INC RDIENTS Avatiabie type engine use Caii price Mm gaiion boats-cars-heIicoptersspeed-pstternscaie-A scaie-kavan-gnition-st3000 PLEASE PRINT CiTY STATE ZiP CARD TYPE AND NC EXPIRATION DATE GATOR RIC PRODUCTS DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offI balsa kit machined wood parts complete lsardware package includes plug-in djustable stab parts new wing mounts Wing Span- 72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim locking clasp SI 995 MV-I TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheets S 1495 Fiberglass cowl Si 595 Clear butyrate canopy. 5 995 OTHER PLANS Tiger Tail 4S-two sheets 120 four strokesS 1495 TAR baby 120 four strokes51195 Alley Kat 40 size trainer sportS 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Oetailed Instructions- $895 Include $2 SOlItem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 4768639 Letters Editor Continued page 12 Ken opened hobby shop Burk & Company Department Store after World War II worked him full-time year until started college After worked part-time until completing college Milton H Fanning Nashville TN Safety/Preston Continued page 22 some MonoKote repairs moral tale wise keep small extinguisher field box As alter native may possible smother fire towel rag blanket Cub Yellow engine cowling first RC model powered Cox 09 began turn first orange brown able smother fire wrap ping rag around front model Have safe month Keytwo/Randoiph Continued page 30 der everything place range check equipmentand its time fly Flying has wide performance en velope compared Paskey Keytwo basically quite gentle flier Whether upright inverted stall shows abso lutely no tendency snap fact model balanced correctly its very diffi cult make snap snaps bag move center-of-gravity aft about /2 increase elevator throw rate /16 up down movement trailing edge aile rons about right comfortable flying Landings can made nose-high slow full aileron control way touch down problem knife-edge flight first airplane persistently climbed half-loop until learned nose stayed up just little rudder Once Id mastered technique knife-edge loops included Keytwos repertoire tricks what did Eddie Williams have say about latest re-creation see youve built another Paskey said unsung maestro drunken pilot routine Its about time Play again Eddie Radio Technique/Myers Continued page 34 Failsafe Flight System small 15 sq light less ounce inexpensive has very low operating current 70 mA works no doubt nine-volt transistor radio batteries expensive about $250 Duracells live will last long time some chance will get care less let run down some critical time unit meets its claims follow admonition use fresh batteries check servo speed during preflight inspection careless youll probably crash some other reason anyway Failsafe Flight System @ $3995 list T&D Flight Systems PO Box 1782 Staten Island NY 10314 additional information call Alex Kronfeld l-7t8/984-9121 Propeller Noise Continued page 42 cause poor community relations Much cure will depend upon education Modelers need understand nature problem order properly utilize solu tions article has introduced propel ler noise problem provided some neces sary background Subsequent articles will explain test results greater detail describe what modeler can achieve better aircraft performance less noise RC Soaring/Blakeslee Continued page 49 down hes hoping arrange factur ers demonstrations during meet would flying demos followed show-andtell sessions guys like Byron Bruce Combat Models Marty Silberstein Steve Peacock Cliff Hangar Models Brian Laird Paul Masura Slope Scale Models Other Id imagine itll much like fabulously suc cessful Richland Scale Slope Fun Flyie fly want long have pin Info available writing Charley SSN 2601 E 19th 51 #29 Signal Hill CA 90804 Better call him 1-213/494-3712 1990 Soaring contests Ray Hayes Vice Presi dent LSF wrote remind us now time plan next years big contests Spe cifically Ray talking about every-evenyear LSF Regionals annual NSS Soar-Ins put go-ahead clubs around coun try Theyre bit expensive Ray hoping Continue tradition awarding beautiful LSF plaques LSF Regionals Theyre worth winning Ray also hoping three super con tests NSS Masters LSF Nationals AMA Nats can spread around country 1990 contests West Coast 89 Ray afraid guys east Kansas beginning feel left out youd like info LSF Regionals check Ray 69598 Brookhill Dr Romeo MI 48065 phone 1-313/ 752-6163 NSS Soar-Ins have handled Marshall Long past few years assume youre 90 Marshall Marshalls address 824 Garden Meadow Universal City TX 78148 worry East Coasters hear Nats will Lawrenceville IL 90 RC Aerobatics/Van Putte Continued page 51 aerodynamic center segment wing Youll note root segment tip another segment Figure 4 shows geometric technique solu tion Remember aerodynamic center panel 25% point mean aerody namic chord panel Once youve determined aerodynamic cen ter panel must calculate area panel using Equation 2 measure distance convenient line aerody namic centers panels Figure 4 shows con venient reference line distance re spective aerodynamic centers distance back reference line aerodynamic center wing located determined Equation 3 mean aerodynamic chord complete wing calculated individual values shown Equation 4 looks just like equa tion determining distance wing aero dynamic center doesnt should since 156 Model Aviation